I'm not a doctor, but I believe it is the early stage of asthma, and you should avoid cold and acidic foods, as instructed by your doctor. Five years ago, I had the same terrible cough all the time. When I saw a doctor, he recommended that I take an inhaler for several months, in addition to other medication. I felt better after continuing with his treatment. Now, after a cold, I'm experiencing the same cough, but I've been taking the inhaler for several days, and the cough has disappeared. It happened to me infrequently.