So you could try therapy again, specifying to the counselor that you want treatment specific to depression. it may be in the past the T's felt your depression was linked to the anxiety and PTSD so if they treated those symptoms your depression would lift.

your other option is medication. it has changed the world for me.

I have been depressed, much of it suicidal depression, for most of my life. I have anxiety, PTSD as well. I was always against meds but things were so bad I realized I had no choice but to try them.

I was put on Wellbutrin for the depression. That and therapy, everything seemed to come together. I never dreamed that I would ever be free from depression I was so hopeless. I took them consistently for at least a year, then off and on for a few months at a time if I felt depressive symptoms coming on. I have been off antidepressants for over a year now and have been doing fine without them.