I think it sounds like anxiety, stress, and the mixed episodes. I have been on Wellbutrin for about 10 years, and if anything it helped my memory. Without it, I was depressed and anxious. When I started taking it, I felt better and was able to focus.

I think maybe you could see an OBGYN and get your reproductive hormones looked at. Also is there any chance you could be pregnant? I know that causes very similar symptoms.