For some years I have had some breathing difficulties on exertion/exercise, but recently (last 6 months or so) it has been getting a lot worse, and I've been out of breath more quickly and taking longer to recover.Although I exercise regularly I only do weights and not running or other ""aerobic"" exercises as they have always made me struggle for breath. A few weeks back after finishing a weight training session I could not recover my breath an d was given oxygen by the assistants. SInce then I have had a number of similar but not as bad ""incidents"" which I think have been exacerbated, but not caused, by the associated anxiety you have when breathing is impaired.
I have been to my GP, had a chest xray which was clear and am waiting for further tests.
About 5 years ago I had a similar period and although he was ""guessing"" the condition my then GP gave me a reliever to use before exercise. Rather foolishly I was worried about becoming dependent on it or that it would make it worse if my condition was mild, so I used it a few times and then stopped and decided to make do without it.
I still have the reliever (blue) but wonder whether it is safe to use it if I feel desperate while waiting for the GP and consultants to diagnose me properly.