Hi.. Welcome to HEALTHCARE MAGIC.. I have gone through your query and can understand your concerns.. As per your complain it seems that you have an inflammation in throat secondary to infection and it is leading to swollen tonsils causing Tonsillitis.. It can be either due to bacterial or viral throat infection.. A you also have symptoms of bad taste in mouth along with post nasal drip that is giving you a sensation of something running down the throat then it can be most probably due to sinus infection or upper respiratory infection.. I would suggest you to consult an Otorhinolaryngologist and get evaluated and a throat swab culture can help in diagnosis and treatment can be done accordingly.. As of now you should continue taking antibiotics for a week and also take anti inflammatory painkiller like Ibuprofen.. You can gargle with warm saline solution.. You can chew a Vitamin C pellet daily.. You can avoid spicy and hard foods and take a soft bland diet with plenty of fluids.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.