Wellbutrin and blisters

I was on Wellbutrin XL 150 mg for 10 days. On the tenth day I started itching, breaking out in whelps, then having blisters in my mouth. Dizziness, it's like I would turn my head then in a coupl eof seconds my eyes would catch up. Also I have no appetite. My stomach just stays upset. Well its been almost a month now and I am still having this reaction. I have been a predisone both oral and IM. This past Friday my throat swelled up and had to call 911 and be rushed to the hospital. Was told to take Pepcid (yes the medicine for ulcers) as it is a histamine blocker and would help keep the hives down. I just want to know how much longer can this last. I was told it can last 4-6 weeks after my last dose. Please let me know if anyone else has had this experience.