I have spent many years coughing often to the point having to cancel things, going to social events has been tough at times. People stare making comments. I have never smoked or been around anyone who did. I have been tested for every disease, lung cancer, and many,many x-rays. I feel sad at times and wish I had answers. I have great insurance but where to go is the question. I've even had my heart tested that's good also. Any suggestions would be great. I'm 47 and have coughed 19 years nothing works. I cough 3 to 4 months then stop for 6 then all winter , my  worst is cold air that starts it up. I would appreciate any help to send me  in the right direction. Thank you