Suggest Treatment For Body Rashes After Using Amoxicillin

I have had a temperature and headache for 8 days. My family doc gave me amoxil and I started to improve. Last night, after being fever free for two days, I developed a high fever and full-body rash. The urgent care doc said it looked like an alergic reaction to the amoxil but I've never been allergic before and had been taking it for five days. What do you think?