I haven't slept for 38 hours and I'm not even close to being tired, and no I don't take narcotics?

I haven't changed anything in my diet other then I slowly weened myself off of Zoloft recently. I still take Wellbutrin for depression. But i have 200% more energy and alertness, not that I'm complaining, but I can't sleep at night....at all, and I have NO desire to sleep...no fatigue what-so-ever. I DO NOT take any illegal drugs or anything that i'm not prescribed from my dr..This started 4 days ago, I couldn't sleep..ended up staying up all night and into the next evening. I then took some advil PM and it seemed to help and eventually I fell asleep for approx. 9 hours. Know as we speak I'm facing the except symptoms....what the hell is going on??????????????