What Lily Dust said! I'd like to add, though, that formula is not necessarily a quick fix. And the risks associated are not worth it.
I absolutly know how you feel. My dd was a slow feeding, short sleeping, often feeding baby. I must have been a zombie! But it did pass, and I am so glad I perserved. She is so very healthy, and I know the life long benefits that increase with every breastfed. It will pass. You are doing great.