I'm guessing, though I don't know, that you're seeing a general practitioner, not a psychiatrist. First mistake. Second mistake, not completing your taper off Paxil, as slowly as you need to do it even if it takes a year, which it probably won't, before you try a different medication. No two meds work the same, and they don't substitute for one another. While sometimes going on another med does help with withdrawal, it's probably because the withdrawal wasn't going to happen anyway. But your doc put you on a drug that doesn't work at all like Paxil and that is the most stimulating antidepressant available -- it isn't generally used for anxiety for that reason. Now, sometimes combining wellbutrin with an ssri such as Paxil will be done because that can help with the weight gain and sexual dysfunction problems, but quitting Paxil to go on wellbutrin is not likely to help with anxiety -- depression, maybe, but not anxiety because, again, wellbutrin is very stimulating. If this were me, I'd not take the Wellbutrin, stop the whole process, and get a psychiatrist before I proceeded further if your doc isn't one. Then I'd decide if I wanted to quit Paxil or try to deal with the side effects through dietary changes or perhaps combining some wellbutrin with it or switch to another antidepressant that actually has a good history of working with anxiety, which doesn't include Wellbutrin. It could well be your main problem is depression -- many anxiety sufferers really have depression as the main problem and often aren't aware of it -- but if anxiety truly is the problem you're going after, then you're switching to a drug that will most often make anxiety worse. And switching before you're off the Paxil won't stop the withdrawal you're suffering. Paxil is very hard to stop, and needs to be done slowly and carefully. You can't make it all go away with another drug, usually. Just the way it is. Again, if Paxil is working really well for you other than the side effects, you might consider Wellbutrin as an adjunct treatment, not an alternative treatment. And if you're not trying to fix this in therapy, never stop trying -- no guarantee you'll be cured but it's the only way you ever will be. Good luck whatever you decide to do.
I was on Welbutrin for 2 weeks for depression and became very suicidal so i would look out for that just in case.