I was tested for strep, the test came out positive. I have been on amoxicillin for almost 18 hours and my symptoms are getting worse. Bad headache, diarrhea, fatigue, ear pressure, nauseous, and my tonsils and back of throat are covered in pus and tonsils are almost swollen to the uvula, almost where it is difficult to breathe. My voice is almost completely gone. What should I do?