I'm dealing with this dry cough that just won't go away. It's been ages, and nothing seems to come up when I cough. I've already gone to the hospital and got tested. The docs gave me some tablets and did an X-ray too. But even after all of this, the cough hasnt stopped. One of the doctors mentioned it's not TB and said my chest looks clear. So what else could be causing this? I'm 26, don't smoke, and only drink alcohol on rare occasions and in small amounts. Just trying to figure out what's going on here.