At your age, you should not be suffering from Primary Tonsillitis as it will point towards immunocompromised status(?HIV ?Tuberculosis etc). Meet an ENT Surgeon, get a CT scan of your paranasal sinuses to search for the primary focus of infection which should be managed by your ENT Surgeon accordingly.

Hi.... Drink fluids. Drink plenty of water to keep the throat moist and prevent dehydration. Try comforting foods and beverage. Warm liquids — broth, caffeine-free tea or warm water with honey can soothe a sore throat.... Gargle saltwater. A saltwater gargle of 1 teaspoon.... Consider lozenges. Lozenges can soothe a sore throat.... Consult Ent specialist....