I had an allergic reaction to clindamycin almost 3 weeks ago. I had a full body rash for about 10 days. I went to my PCP twice, received a steroid shot, but I still have soreness in the roof of my mouth, some swelling in my lips (comes and goes), burning and stinging in my lips and tongue. I've gone to my dentist and my ENT doctor, and no one can figure out my mouth issues. The ENT doctor said it might be a lingering effect of the allergic reaction. Any suggestions?