breathing sounds

when i like turn my upper body a weird sound comes out. like im losing my breath or something. it doesnt hurt but it scares me. im scared to tell my mom because i havent been myself lately and ive been smoking:/ im a runner and i just been stress and im to ashamed to tell het. im 16 and about 111lbs and im 5'5. i dont know if that means anything but i need to know if this is something i need to be aware about. when i twist my upper body fast its when this happens i just noticed today when i was popping my back.... please help

[sweetpea03]

It's probably from smoking, which is restricting your lungs from getting the oxygen it normally can and not holding it properly. Stress can also cause a number of problems. I would urge you to stop smoking and look for healthy ways to relieve stress.