Talk to Pediatrician on Pediatrics

My son age 6 had slight pain while swallowing saliva or drinking water etc. His tonsils were swollen.He had fever as well. Did augmentin ds course 5 days 1 big spoon(tablespoon) morning and evening. Gave calpol 6 plus only 2 doses. After completion of augmentin course there's no pain. No fever. HOWEVER still child has cough and voice is low hoarse. He was advised adenotonsillectomy 3 years ago. BUT we didn't get him operated. For last 1 year he remained healthy without antibiotics. I think he used cold water and ice cream which caused tonsills swelling again. Child is also advised nutropil folic acid and omega because of brain waves disturbances in EEG brain activity test by neurologist. HE was taken to neurologist upon showing hyper behavior and fears...