I've been a successfully medicated depressive for many years. But I remember at times in my 20s and early 30s, sometimes I would just have a wave of sadness wash over me, with no identifiable precipitant. Like - where did THAT come from?
Then after I got put on a tricycle antidepressant, I remember being in the swimming pool at a health club and finding I just could keep going without any effort! Whereas before, I kept coaching myself "just one more lap" now I could just zip on through my routine. It also took away those random waves of sadness.
So in answer to the OP, you might do better on antidepressants. Have you looked into them? If you already take one, is it possible that it's no longer effective for you?
_________________
A finger in every pie.