Sounds like you have encountered a vampire and have contracted their desease. Find a shrine, cure the desease, get some sleep, and your back to normal.
If that does not work, you have encountered a bug that many people discovered while meeting Harkon. You may need to re-load a save, and wait for Harkon to finish his speach before you leave his castle.
There are a few topics on this bug in the forum. Search Harkon speach.

Good Luck

HAHA check the screenshot thread. posted some there

Played about 3 hours last night and found Serana. Took her straight home to Whiterun to introduce her to the wife and my pet wolf haha. Didn't have any issues either with Dawnguard or the mods I continued running. Fingers crossed though.

Had one random vampire attack on Morthal after I rested for the night in the tavern. Two of them killed a guard before I could join in. I made very short work of them after that. Helps having a follower mod cause my other two followers are set to essential and to fight anything that is hostile. If I come across a town under attack I bring an army to help. I will look into mods that stop vampire attacks though.

I made that statement when I was about 70% thru the Dwemer quest.

I've since solved my bug of the 'visit DG HQ' problem where they were attacking me on site.

And I stand by my statement - this is an IMPRESSIVE AND AWESOME DLC.

I WOULD love it as much as you do if it didn't have more bugs than a butterfly sanctuary.
I cant even finish the main quest.

So far I'm quite liking the DLC.
Haven't touched the main quest line too much, only up to becoming a VL.
My nosing around caused me to happen upon the dwemer quest, this first city you explore is quite impressive to look at with a good ENB active, especially the fallen over tree trunk allows for a nice view.

Only bug I ve come across is my werewolf form not going back properly. But I only went into WW once to unlock all perks of it. Subsequent bug was the achievement of that thing not unlocking when I was done.
Other achievement for the storyline did unlock, so perhaps lycanthropy got bugged because I was a WW before dawnguard was available.

My other (non dawnguard related) bug is that my game can't do more than 2 gigs of ram usage. I have it LAA flagged and everything, but as soon as I hit the 2 gig RAM mark it either freezes up or CTD's.
With 16 GB ram I find it hightly annoying that about 14 GB is NOT used for Skyrim.

From a skryim point of view, the DLC is pricey in terms of content added compared to the initial game.
From a general gaming point of view, there's full fledged games that have less content or storyline that ask the full 50 euros.

I am more impressed with the latter comparison than the former. So two thumbs up here for dawnguard being a most enjoyable DLC.

Ooohh! I just turned level 10 and Dawnguard is now available. Can't decide if I should continue to level up a bit or get stuck in?

11 hours into the DLC - finished the dwemer quest, maybe 40% of the way thru the main DG quest.

Serana is a cutie.

Impressive new areas to explore. Fascinating additions of various abilities and materials to the game.

Most importantly - DG has brought back something to my Skyrim gaming experience that I haven't had in months - fear and anxiety when walking into a cave/dungeon/ruin and confronting the unknown.


Bethesda - keep this up and the Skyrim platform will generate ANOTHER $1B in sales over the next 12-18 months.



If the rumors are true that the next DLC will be larger and justifiably be considered a full blown expansion, it promises to be MIND BLOWING.

DLC seems great so far but I am bummed you need to be on Dawnguard side to get cool crossbows. I planned for my archer, who is my evil character, to go vamp. Oh well.

Yay! So nice to see a thread actaully praising the DLC instead of one complaining about it in some way.

I've had Dawnguard since it released on Xbox and I haven't even completed it yet. Infact, you're probably further than I am. I want to savor it a little bit since I don't know when the next one will be around. It really hasn't been difficult for me to take it slow since I have sooo many other things going on in the game. 200+ hours and I haven't even completed Skyrim's main quest.

And Crossbows are awesome! I flip over to third person while I'm wearing the Crossbow on my back and I feel like a total badass.

I think you can get a crossbow at the very begining, even before you join the Vampires. I know I got one.

I'm a vamp with a crossbow.
Sort of killed Durak while in my werewolf form to get that perk tree filled up before starting anything DG related.

Funny thing about that: I killed him in Riverwood, yet I found his corpse again in front of the DG fortress.

Agreed

I just started the dwemer quest OP mentioned, and I've got to say it's fantastic! Can't help feeling that the fact you have to actively seek it out using in-game hints is a response to the criticisms of hand holding players into quests as well.

Well played Beth, more of this please!

lol, i found the Fort by accident while in beast form. i barged into the canyon, killed a guy, and then saw the fort. whoops.
but i joined anyway, and i just found Serana
so far, i think she' great. you actually ned to earn her trust before she lets you boss her around or tells you anything.
it's a shame she can't be married, but the rejection is good. finally, someone who doesn't fall in instantly love with you!
(i think maybe beth are laughing at the peeps who want to marry her.ymaybe they purposely made a follower that you connect with and possibly become attached to, you slip on an amulet of mara, walk to her, ask her if she's interested and then... rejected! to troll us)

Definitely. I think there are a fair few responses to complaints in the whole DLC in that regard. Just a shame that other aspects of the DLC have attracted a whole load of new complaints - justified or otherwise!

Only thing I don't like - and otherwise I think Dawnguard is a really great addition to Skyrim, in all ways - is that Werewolves are incredibly weak compared to Vampire Lords. Normal vampires were really boring in vanilla, but they went overboard with the Lord transformation. I just wish werewolves would have gotten some new functionality as well with their perk tree, some powers that are different from summon / detect / fear. Ah well, can't have everything.

Keep it up, beth. Now you just need to fix magic and introduce some more factions.

totally agree with you, just when I first started the game it was awesome. When I began the quest line, my mind was blown.

lets see i wasted 20 € then wasted 2 hours trying to get it to work without crashing only to discover after 1 hour of playing that the mods i had to remove did a much better job than the so called new features

end result waste'ed another hour uninbstalling it all and reinstalling skyrim without DG and with all my favorite mods

That's a shame. You're missing out on some stunning quests.

maybe , i m pretty convinced this DLC wasn't even finished and everything wasd done in a hurry

Bah, a REAL archer doesn't use crossbows anyway. Those are for those sissy, graceless knight types.

Quick update:

13 hours into it (been playing lots this weekend.)


Dear Bethesda:
Whatever your creative guys want - a refrigerator stocked with caviar in their office space, a pool table, a pingpong table, trampoline, olympic size swimming pool, a bar with super hawt waitress chicks wearing playboy bunny outfits - give it to 'em. Do anything it takes to keep them happy.

I've reached the part of the main quest where I'm looking for a particular item (don't want to give details as it could be a spoiler) and it's a long effort to get it.

The scenes and scenarios.............................oh my God.


I don't know where you found your creative designers, Bethesda, but they are a marvellously talented bunch. Worth two or three times their weight in gold.

I'm glad your enjoying the DLC. It's nice to see that someone is genuinely having fun with it .

Amen brother.

Cheers

Man, I've been taking my sweet time with Dawnguard. By the sounds of it I should pick things up a bit. I get sidetracked though, there's so many other things to do

Yeah, will be vising those places again just for the view.

Enjoying the DLC so far, not wasted the vampires yet but on my way to kick their door down. Level 46 Hammer nut, reduced tons of vamps to bleeding piles of pulp so far and looking forward to making Vampire Lord pulp real soon.
The side quests I have done so far were enjoyable too.