Well alex p.b, what the med officer at the CFRC running the med test will do is ask you a whole string of questions. One i think will be regarding asthma, if you had it or if you use a puffer. Now this mysterious person who prescribed you the inhaler is not you general physician right? because if he isn't then technically you never had asthma or anything like it. So when the med officer asks you, you will have to answer yes i have used a puffer almost 8 years ago. And tell him your story, if he provides you with a letter to be filled out by your doctor then it shouldn't be a problem because he/she never diagnosed you with asthma. Anyhow the asthma tests you need done aren't regular kinda walk-in done tests. Your doctor will have to first refer you to a respirologist,then arrange an appointment. Then the respirologist will send you to have tests done and in the end write the report with the results. The two tests done are the PFT (pulmonary functions test) and the Methacoline Test. The methacoline triggers and asthma attack, if you do not have asthma nothing should happen (which is what you want). Its all calculated with lung capacity and heart rate and stuff. BUT since you have mentioned Exercise Inducive, theres a third test called an EIT (Exercise Inducive Test) in which i believe you are physically exerted and then they do PFT's and stuff. I would suggest going in and having your med test done, then see what you are left with.
Im sure you won't get stuck in this, but if you do its gonna be a long wait. But its funny i feel like i could wait another year after waitng two already.
-I hope this has somewhat helped you and not further scared you.
-Good Luck
-if you have any other questions just PM.
-Usman Syed