If you have been diagnosed as bipolar I'm not sure why you'd be prescribed Wellbutrin. My doc was going to prescribe it to me after Lexapro and Prozac each gave me reactions similar to what you described... I had terrible insomnia, racing heartbeat, mania, and just a really blurry couple of weeks. I asked him if all antidepressants would have similar effect on me if in fact I am bipolar, and he told me they would, and so prescribed me Lamictal instead of Wellbutrin.
I have had some periods of extreme depression, and what helped the most--besides a cocktail of medications (lithium and zyprexa... after trying several others that didn't work)--was simply getting up out of bed and being active even when I felt like complete [censored]. Knowing that I could accomplish something with my day--even through the haze of BP--made me feel somewhat better. Of course I couldn't really fix the medical aspect of it that way, but it sort of helped me come back down to reality, and realize that even though I felt terrible, I could still--at least sometimes--live my life.
I know this doesn't always work. Trust me, I have spent plenty of days miserable in bed, but just try to live your life, and, of course, express your concerns with your doctor and see what you can do.
Anyway I hope you get something or other out of my comments.
Hang in there.