is it realy asthma or COPD? im worried

I had asthma since i was born and was always on flixotide and salbutamol until about 7years old. from then i never used any type of asthma medication and my asthma was gone untill i was 15/16y old. 8yo was first time then i tried smoking and between 14-16years i was smoking occasionally in the highschool few ciggarets a day. at 16 i found out that it was hard for me to breath. i was put on flixotide and salbutamol again and seems it helped. but i was still smoking rarely on several ocations in parties or festivals (both tabacco and weed) till my age now 23 and using salbutamol rescue when i felt i needed it. at about 21yo i was put on foster preventer and it helped until two years later i feel that its hard for me to breath even on it (says formoterol should work for at least 12h bus it works less for me) and ventolin does not seem to help very well. i still hear weezing and flare up with these medications even in calm state. What i am very concerned that most asthma for every people comes and goes in the form of attacs. for me its always constantly hard to breath if not using bronchilators. i newer had sudden atack and never felt good breathing without medication. for me symptoms looks like COPD. but at the moment i am 23 years old. It impossible to develop COPD at such young age event with ocational smoking, right? spyrometry test seems to be very good with FEV1/FVC is 73% before salbutamol and 78% after. and my pulmonologist says that its non alergical asthma, but for me its hard to believe now, because asthmas comes and goes in forms of attacks. Anyone also thinks it could be just constant asthma without any attacks, just constantly hard to breath for years without relief?