I have had a dry cough for 3 months now. The Dr. has changed my diagnosis every time I go (which is frequent). The cough starts with a tickle in my throat, which makes me cough this loud obnoxious cough that feels and sounds "dry" but produces this sometimes thin, sometimes thick white/clear mucus. This happens all the time, day night whatever. The Dr. has changed my Bp medicine twice, both times waiting 3 weeks, then it was antibiotics, then asthma, then allergies, then musenex and chest xray, bloodwork and others. Has tried numerous cough medicines to help me sleep, which did nothing. This cough is unrelenting and is driving me crazy. please help.