I was on a combo of atovaquone, azrithmysin,doxicycline and nystatin for lyme and babesia.day 40 developed traveling hives/rash . stopped all medication. but now 4 days in there is no improvement. been taking benadryl which only helps about an hour?

Need to see doc: Based on stated information it does not sound that your rash was due to side effects from the antibiotic/ antifungal combo you have been taking. A variety of conditions, including renal and/or hepatic, related or unrelated to your treated infections may have developed and your best reference at this point is your treating doc who will have a clear history and documentation of your ailments.