Tao, I do understand how faith can help with feelings like you seem to be having. Faith alone, however, does not usually change the chemistry of the brain so drastically. (It can, but...) It's because God made our brains to work a certain way, and the hiccups it gives us is also part of the way it works (or doesn't)... if you need medicine, it's ok to take it... if you need hospitalization to help you stablize, that's ok too.
What you are thinking... How you are thinking... is depression talking, not you. If you can get into some CBT (cognitive behavior therapy) or such that will show you how it is you are thinking.. that will make things better for you. For you see, though you don't have hope... there is hope. (It isn't a one-person only thing.) The truth is??? That you don't see any way for change when you are depressed, is because of the way your thinking breaks down when you need it most.