I'm just wondering if it could be negative symptoms which is a little different than depression and much harder to treat with meds but it is intermittent....I know a couple of times this year I felt certain things had no value and rather intensely so...first my job then any social interaction. I knew it was wrong but I still felt that way...have you talked with your doctors about negative symptoms of sza as opposed to depression or comorbid with depression? Mine only lasted about a week at a time so I don't know how to treat it officially ...I tried a sun lamp the first time but then my pdoc warned me it might make me manic so I had to be really careful but still it took the edge off for me and while I wasn't 100% I stopped doing zero at work....anyway just wanted to ask that and really wishing you all the best that you might feel better soon....