Hello! I read your query and I understand your problem. If your son was my patient I would suggest you to wait a couple of days more, in order to give time to antibiotics to work. I would also suggest you to take care that your son gets plenty of rest and drinks lots of fluids, teach him to gargle (if he can do it) with warm salt water several times a day, help him use isotonic saline nasal spray several times a day, give your son acetaminophen or ibuprofen for high fever. Meanwhile, I would also suggest you to teach your son to wash hands frequently; teach your son to not use other persons cup, glasses, toothbrush or other personal utensils; teach your son to not kiss friends and relatives until he is completely over the tonsillitis; teach your son to cover his mouth when coughing or sneezing; buy a new toothbrush to your son once he has started the antibiotic. I would suggest you to call your son s doctor if his condition gets worse: he has difficulty in breathing or swallowing, his symptoms do not improve within a couple of days. I hope I answered your question. I hope your son will get better soon! Best regards!