Now I finished Dawnguard. And I am wearing the armour the snow elf vamp had. And I have been really careful about not becoming a vamp. And now I have ended up getting it. And I want to get rid of the disease. I have tried drinking cure disease potions and they don't work. I also have tried talking to several bar owners about rumors and nothing. I hope that this isn't a I asked this in the general section as well. I have been to several cities and went in the bars and talked to the keep about rumors and nothing comes up about Falion. Heck I haven't been attacked yet either.

Talk to Falion in Morthal, he will heal you in exchange for a filled Black Soul Gem. The Dawnguard will also send you to him.

Before you go to Falion I think you have the inn in morthal and ask about whats going on in the town, to get the quest to start. Like local rumors.

And before any of that, you should really consider coming over to the Dark Side.

...we have candy!