I've been on 50 mg of Zoloft for almost a month now (monotherapy). When I first started at 12.5 then 25 I felt great...almost too great (I described it as waves of feeling like I was on crack or something). Then everything seemed to level out, but now for the past 10 days or so I feel both depressed and energized at the same time. I am filled with sadness, hopelessness, confusion, and self-loathing on the one hand, and then on the other I feel a need to do things and be productive...but I have no motivation or direction at all. it's horrible because I can't just sleep or lay around even...thoughts are racing and I basically just end up staring at the computer or tv because I can't decide what to do, as everything seems too hard or meaningless. I also thought my anxiety was getting better, but now it's just as bad as before. I don't know what to do or why this is happening...