I am so sorry to hear you’re in this situation, anon. I think in your case the first thing you need to do is to tackle your depression, so you CAN move out and get away from your abuser.
Find out if you have health care that covers therapy and psychiatric care. If it doesn’t, please research free or reduced fee therapy and psychiatric care in your area. Key words to look for are “sliding fee” and “pro bono.” Often clinics in urban areas offer therapy on a sliding scale for those who can’t afford it normally.