Hi and welcome, You are suffering from acute pharyngitis and infective tonsillitis , caused due to inflammation of mucous membrane lining the throat, it is usually bacterial or viral infection. Since you have been prescribed with medicines and your are responding well i suggest you to continue with the course. Formation of ulcers and inflammed hard palate, cold sores may be secondary effect due to dehydration and dificiency of vitamins. you can start with multivitamin supplements or vitamin c lozenges for 5 to 7 days which heal up the ulcers. Mouth gargling with antiseptic mouth wash like chlorhexindine will give soothing effect ,prevents infection and promotes faster healing of ulcers. i hope this helps you, take care.