My 10 year old daughter developed a rash on her chest Monday mourning.My wife took her to the doctor.Although she did not have a sore throat the doctor tested her for strep throat.She tested negative for strep but the doctor gave her some Amoxicillin any way.After her Dr.visit she developed headache(before taking the antibiotic).Since then the rash has subsided but the headache returns 4 to5 hours after I give her Tylenol.Yesterday afternoon as the headache returned between doses of Tylenol she had a temp. of 99.3.Last night before bed she vomited until her stomach was empty.She woke up a couple of times feeling like she needed to throw up but couldn't.She is drinking and eating little bits of food today and with Tylenol the headache seems to be in check.My question is does this sound like a case of strep or are these symptoms an indication of something else?