Female, age 15, height 5'1, weight 119. I went to the doctors yesterday because of a horrible earache, she said I had a full blown ear infection in my right ear, the kind usually only young kids get, and she was really shocked about that, so she subscribed me, amoxicillin, and tylenol with codeine, ive taking 2 doses of each so far, and this morning i woke up with about 5 ulcers in my mouth, and really achey from my abdominal section up to my shoulders and back, my head and left ear feels really cloudy and hurts a lot, and i feel very nauseaus. Do you know what this could be?