I Was Taking Amoxicillin For A Tooth Needing A Root

I was taking amoxicillin for a tooth needing a root canal and after the procedure, I got a mouth sore where the stuck me with the novacane. That was two weeks ago. At the same time, my forehead and left earlobe has broken out. It kind of looked like acne on my nose and forehead. It doesn't seem to be now because they are all still red and swollen in blotches.