How to tell if you have asthma or emphysema?

If two different doctors listened to your lungs and diagnosed you with asthma and you passed a pulmonary function test would you still be able to have emphysema instead? I smoked all of my teen years and I'm now 20 and I can't breathe good and I'm worried it's emphysema because I'm not... show more If two different doctors listened to your lungs and diagnosed you with asthma and you passed a pulmonary function test would you still be able to have emphysema instead?

I smoked all of my teen years and I'm now 20 and I can't breathe good and I'm worried it's emphysema because I'm not responding well to my Proair inhaler the doctor prescribed me. I need some time of comfort.
3 answers 3