I have had a chronic cough for almost 3 years. Worse when I lay down, but bad all day too. Diagnosed w/ reflux, on ppi twice daily, doesn't help at all. Had full battery of scans, including pet. Dr says my lungs are clear. I have not slept through a night in 3 year, I wake up choking and often spit up globs of mucus. I do start coughing as soon as I eat anything, even on the medication. Any thoughts??