Get your doc to check it out again, and hopefully he or she will give you a prescription for an Albuterol inhaler. It's been a lifesaver for me.

I have/had asthma that seems to be triggered by allergens, as well as exercise. Albuterol really helped when I needed it. I haven't had any attacks in several years. One thing I did was move out of an apartment with carpeting and into a house with wood floors. I haven't needed my inhaler in several years. I used to carry it with me, but I've gotten lazy. Probably should just in case.