Sometimes i have a barely audible wheeze. i do not cough, not breathless,22y.o., used to smoke for 5 years but i quit 8 months ago. could i have copd?

Unlikely COPD but: You should see your doctor to get a sense of where the wheeze is coming from and the cause. COPD usually takes longer to develop and is quite rare in someone of your age. You could have some form of irritant airway reactivity, but remember, not all wheezing come from deep in the lungs, sometimes it come from the higher up in the wind pipe or throat. Best of luck.