this is the acute condition of throat infection ,in this you need to have consultation with ENT physician as soon as possible

Drink plenty of water,eat soft foods like cooked cereal, mashed potatoes, soft fruits, yogurt and soft-cooked eggs...give adequate rest to your body..Avoid spicy foods or acidic foods. Gargle with warm salt water. gargling several times a day can help relieve throat pain....you will require antibiotics to clear up infection..Consult nearest ent specialist they will do the needful.