Hi. I have had a chronic, dry cough for over one month. After two weeks, i went in to my MD who listened to my chest, determined it was not in my lungs or bronchi, and prescribed an anti-biotic. After ten days I had no relief. I went back, we did some chest x-rays, a CT scan and I was put on Prednisone for nine days. Again, no relief. I do Not feel sick. Nothing seems to be blocking my breathing and I do not get short of breath. There is a scratchiness in the back of my throat and if I try to clear it, I have a severe, hacking cough that stops me in my tracks and often I will loose my voice for some seconds. Any ideas?