Yes Please. I Am Very Concerned Because I Have A

Yes Please. I am very concerned because I have a cough that won't clear up. I have had this cough for a couple of month's now. I've been to my Dr. many times over this. He keeps trying me on different meds, but it just won't go away. My chest is full, heavy and I cannot raise anything up at all. I have had two Chest X- Ray's that came out clear. What should I do? Thanks!