So, 5-6 years ago, I got into some c**p I shouldn't have. I smoked the synthetic weed (posh) and one night I smoked too much. Ever since then, my lungs haven't been quite right. Used too they'd pop every time I breathed in deep, and would be sore if I sat in a certain position. That ended about 2 years ago and now I've noticed that air gets caught down there and I can burp it up if I try. Also, when I lay down at night time, I wheeze real bad and can't get to sleep because I can't seem to catch my breath, but when I run during the day (which I hardly ever do) it seems to make the symthoms so much better. Almost not existent. I've noticed it most in my left lung. And the symthoms get worse when I get around cigarette smoke. I obviously don't smoke anymore, but can anyone tell me what's going on? I've had chest x-rays and EGT tests done but both showed up clear.