Wellbutrin and ct scan

Hi! I've been on Wellbutrin XL since November 2007. It's late February 2008 and I just stopped taking it two days ago. I know I shouldn't go cold turkey, but like others...I'm afraid of the side effects.

I've been having headaches since December. After having my eyes checked (prescription barely changed) and returning to the chiropractor (thinking something may have been pinched in my neck), nothing helped. I have NEVER had migraines until I started taking this medication, which a friend brought to my attention. "When did you start having these headaches? Wasn't it around the time you started Wellbutrin?" He asked because he, too, has had issues finding an anti-depressant that worked for him. On many, he's experienced headaches.

My doctor ended up prescribing a CT Scan and an MRA w/contrast of the brain because I told her that, in addition to the migraines, I also had two occasions where it felt like I was going to have a stroke (like my head was just going to explode and I almost passed out).

I have yet to have the scans due to an insurance issue, but I have stopped taking the Wellbutrin to see if that will help. I'm not looking forward to the depression, but I'm hoping I can take other positive steps (exercise, proper diet, vitamins, etc.) to avoid taking any more anti-depressants. The side effects are NOT worth it, at least at this point. I'm just going to have to find another way to get myself out of bed in the 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?