My 11 month old is not acting right. She is crying and very upset. She seems to me like she is in pain. 2 weeks ago Dr. Put her on amoxicillin. Last dose 2/29 am. It was for a sinus infection. Took her to the er last night and she was diagnosed with viral syndrome. Tonight she is just not normal. Crying and acts like she is in extreme pain. Am i missing something. She had a temp of 100 2 nights ago but normal since.