Hi, I have had a cough that won't go away. It has been 6 weeks now. First, I was prescribed amoxicillin, as the doc thought I had a sinus infection. That helped the congestion a bit, but the cough didn't go away. Then I was given a zpack which lessened the cough, but I still have the cough. The cough is very light to nonexistent during the day, it really picks up at night. It has been this way the entire time.