I'm looking for Fortify Enchanting and Fortify Carry Weight
I've been to every shop and no luck
I'm level 27.

There is none for fortify enchanting

check the vendors for enchanted stuff pretty much all of them will have enchanted items. Some are lvel gated though I think. And the rarest ones like paralysis and banish might not be able to be bought at all.

I know I saw the blacksmith in Whiterun w/ some carry weight boots the other day, there's a place to start. As someone else stated, there is no fortify enchanting enchant, just as there is no fortify alchemy potion.

The paralysis and banish ones can be bought. I got both from the blacksmith in Whiterun

So there is only an enchanting Alchemy potion?

For me, carrying wasn't that hard to find, that enchantment pops up everywhere for me. It was Banish that was the hardest for me to find, I couldn't find a single Banish enchanted weapon until just recently when I hit level 50.

Only use Banish if you're enchanting to sell, as it's the one that give the most money. It's almost worthless unless you only use it to fight Dremora.

Yes, this way you can't invest in only one or the other, you must invest/spend time in both in order to benefit in the other.

As you level up, you'll find more enchanted weapons and armor. If you find two or more weapons with the same enchantment (i.e. fire damage), make sure you destroy the crappier weapon when you use the Arcane Enchanter. The Enchanter just teaches you the enchantment: the quality of the weapon you destroy doesn't matter.