Celexa and lethargy

My doc had me on Celexa, Respirdal and Wellbutrin, all at the same time. I don't know which drug is responsible for which side effect, but they include weight gain, insomnia, lethargy, inability to concentrate, loss of volition, hopelessness. I quit. I went cold turkey for 10 days, but realized this was a big mistake. Now I'm weaning myself off slowly. I feel out of control and scared. I hope this doesn't last too long.

This is my fourth day on Celexa now. First day I felt very tired (yawning all the time), kind of spacey/slow, jaw hurt, nauseous yet strangely hungry, headache, lathargic and had a cramp in my leg that night. Day two I felt great except for another leg cramp that night and sleeping longer than normal. Day 3 I felt very tired, nauseated which calmed down a bit once I ate something and again very tired and slept longer than normal. Day four, so far I feel great with no side effects other than sleeping longer than normal, I feel alert and the spaceyness/lethargy is totally gone now along with the nausea which are the symptoms that bothered me the most. My depression has lifted substantially.