Hi, I have dry cough month back because I had drunk excess cold water. to cure it I took some anti-tussive cough syrup. After two weeks it turned into chesty cough. I have been taking cough syrup, but its not getting better. As of present I cough all day long with thick yellow coloured mucus. As night when I go to sleep I have to keep a clove bud chewing inorder to stop cough so that I could sleep. Please help.!!