About my asthma. Do I need to worry

[Juanolo]

I am 16. I have had mild asthma since I was like 11 and have albuterol. I lately have been wheezing before I go to bed and when I wake up I don't know if its anxiety related because I get really nervous that I will one day have an asthma attack or become hindered by asthma or get COPD. But the thing is that I no longer get bronchitis after a cold, and I can exercise with out wheezing afterwards> I go to the gym almost everyday and do cardio (running for a few miles), I lift waits and have an athletic body. But the thing is I get wheezing at home before going to bed and early in the morning and whenever I go to the doctor in the rare chance that I wheeze during the day it goes away the minute I leave the house and step into the doctor's office. And I recently had my checkup and everything was "beautifully healthy" as the doc put it. Also every year I go to Cusco Peru and to Lima. In Cusco I get no asthma and in Lima I stopped getting asthma (it just stopped even though the city is incredibly poluted) yet in the US I still have it and only in my house. I don't know if its anxiety caused and if I have anything to worry about. I also don't wheeze while I sleep (mom said) its just the moment I lay down and the moment I get up. This has occurred only recently and usually only happens in the summer.