Suggest Treatment For Itchiness All Over The Body

I started taking the generic for Wellbutrin about 4 weeks ago. about nine days ago, i had surgery in my mouth and was put on amoxicillon 825mg twice a day, after 4 days of taking the amoxicillon I started to itch extremely bad on my scalp, hands, arms and belly, but most intense on my head and hands. I called the dentist and they said I was having an allergic reaction to the amoxicillon and to stop taking it... It has been 4 days since I last took the amoxicillon and I am still ictching and get some hives like things only in the place I itch, it doesn't seem to be as intense, but I have been taking benadryl everynight before bed. After looking on the internet I have read that some people taking the generic wellbutrin for some time had hives and itching. Do you think I should stop taking the wellbutrin asap, and go to the doc?