I had a terrible case of GERD for a long time, but since I changed my diet I seldom even have any heartburn. But for over a year I have had an unrelenting very frequent cough with a great amount of phlegm. My doctor, a pulmonologist, told me that this upper respiratory infection is because of GERD. When I told him that I no longer suffer from GERD, he told me that it is possible to have this infection caused by GERD without the symptoms. He has put me on Nexium, and I have been taking it for over a month and there has been no change with the upper respiratory infection. I am really suffering from this infection. Is it really so that you can have an infection like this caused by GERD without any symptoms of GERD? I have seen eight different doctors in the past year for help with this. Most of them, except the pulmonologist, told me they don't know what the problem is......allergies, COPD, asthma, chronic bronchitis, etc.