Hi I I. Have Had This Cough For About Two

Hi I I. Have had this cough for about two weeks went to the docter she told me to do what I was doing take the cough medicine and lots of liquid an t th he cold yake it coures.This cough hasn't got any better I can't even lay down to go to sleep iwill start coughing consently and I have to set to sit up because I cant breathe