Maybe due asthma, chronic bronchitis...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 physician they will do the needful.