Wellbutrin and next morning

This is the 3rd time I have been on Wellbutrin. Once in 1999, then in 2004, and just started taking it again 3 months ago. The first two times I took it I had joint pain and a lot of muscle inflammation. This go around is different... Just recently, within the past few weeks, I started breaking out with hives, after taking it with no problems for three months! Started on my head and progressively got worse. I break out all over my body, head, legs, back, hands, etc. For some reason it seems to happen more frequently when I lay down in my bed to go to sleep (weird!) One other scary side affect is, I frequently stop breathing when I start to fall asleep, and wake up gasping for air. Has anyone else experienced this?
Since I had never experienced problems with hives the first few times I was on Wellbutrin, I didn't think it was the medication causing the hives. So, I cut my dose in half (50mg/day). The hives didn't go away, so I stopped taking it all together 3 days ago, but still continue to get hives. Does anyone know how long it takes to get it out of your system?

I started taking Wellbutrin three weeks ago. I had been taking Zoloft for four years and it had been working fine except my insurance company tripled the cost and I was beginning to have to take more to get the same results. I thought Wellbutrin might be good alternative after doing some research and my doctor thought it would be good for me to try out. Well, since I have been taking Wellbutrin I have become emotional (wanting to cry at things I would never cry at before), more irritable, my husband says "I am not the same person", dizzy, two sips of a beer gave me a horriable headache which lasted until the next morning, I had to sit down on a bench at the mall because I felt like I was going to faint, and worse of all my brain became very "fuzzy" feeling. It was like my short term memory was damaged. I am taking a Spanish class and was doing well (A's). After I started taking Wellbutrin I could not concentrate enough in class to learn, even saying to my professor, "please skip me, I am not feeling well". It was humiliating. I have maintained a 4.0 in every class I have taken since 1999 and completed a masters degree last year. So, all in all-this was my experience. Maybe if I had taken it longer, it would have been different, but it was like torture for me. One positive note....I felt absolutely no internal depression after a week of taking it (other than being upset about the other symptoms). It worked really well in that area.....so, maybe if others do not have all the symptoms I experienced, it would be a very good drug to take for depression-just not for me!