I am being a bit of a hypochondriac. In quite a bit of literature it states that the lungs begin to clear and a former smoker starts coughing within the first few days. This is the third time in one year that I have attempted to quit (this time I will truly stop) but I have never coughed. The longest I have gone before is two weeks and never a cough. Has anyone had this experience? Any idea what or if anything is wrong?