my seven year old son is suffering with chronic cough without wheezing. When he was a baby he was found to have GERD(frequent vomitting after every feeding)It stopped when he was 3 . but he started to have chronic dry cough early in the morning(or before he gets up from bed).He is very thin ,underweight, not so interested in variety of food.But he is a brilliant boy who comes first in his class . He likes to play and study well. But his cough makes him frustrated. He had his allergy test and found to have no allergies and no asthma.Any remedy please. Chiropractor?GERD treatment?what could be done?