B.
My twin daughters coughed until I thought I would go mad. It was especially bad at night and after exercise. The pediatrician diagnosed asthma, but it just didn't seem to fit to us. We went to see a specialist, Dr. Richard Mayse of the Texas Regional Asthma and Allergy Center to find out more. Dr. Mayse found that our daughters both had cronic sinus infections. They were treated with antibiotics (took more than one course to completely knock it out that first time). Subsequently, they were rather susceptible to sinus infections for several years. The cough and circles below their eyes were the symptoms. At this point, they have these infections much less frequently. I am so thankful that we found Dr. Mayse (who is very nice and good at educating and communicating with parents). I really did think I would go mad with all the coughing and he saved us. No idea if this would help you too, but I would definately suggest seeing a specialist.