I'm 23 years old, 8 year smoker... Ive quit for a couple months but no improvement.
I have absolutely no cough, no tightness in chest, it doesnt wake me up at night, it seems to get worse when I think about it... like at the grocery store or the gym. Its constantly on my mind tho, so its hard to gauge.
It didnt come in gradually, one day I could breathe, then I got sick, and the difficulty breathing never went away after my cold was gone.