I'm so sorry for what you're going through right now. I hope you continue to post on PC and that it helps even a little bit just to write the words.
You didn't mention if you were in therapy as well as on
Meds--is that a possibility for you? I hate sounding like a broken record but my daughter who has MDD, anxiety and Ptsd has just started a new therapy called emdr, and believe it or not, I think I see a tiny improvement in her mood and energy level already and a reduction in her symptoms (flashbacks). Perhaps it's worth exploring?
I hope you hang on and keep trying, and sending you virtual hugs