I have had asthma for years. Last year in December, I had an extreme cough that neither my PCP, or pulmonary doctor could figure out. It is not COPD, as per bronchial testing. It lasted 3 months and many treatments and the doctor is still not sure why. Two weeks ago, it started again. No fever. Took Z-pack and am still coughing. Cough is dry, uncontrollable. The rattling noise in my chest is making me crazy and makes feel like I have to cough to catch my breath. Doesn t work. Any ideas to help get rid of the rattle/cough. I do drink lots of water. Never a smoker. No pets or other allergy triggers.