How do I get better?

I am new to site.Little info on myself My daughter is a 5 year heroin addict. I was unaware for awhile. She stole everything I have. I am on meds for depression but I keep struggling. I had to file bankruptcy because of $55000 in credit card debt helping her before I found out and then. Helping with rehab .If I dont help she will be homeless. How do I get better ? I cry constantly. State took both my grandkids away 4 years ago. I am so depressed even on my meds. I cant stop thinking if I did something different or if I was better person She is almost 30. Always claims she getting better. She only yells at me when I try to talk about how I feel. The only thing I do now is keep her rent paid.I only work and sleep. I have gained 70 pounds since this started.I need to know how to get past this depression. Thank you