hayfever is caused by dust and fluff do you create any dust when you workout and the excersizes you do seems too much for the asthma,you are hurting your lungs with too much excersise,try slow motion p.e.and explain to your teacher about your hayfever and asthma,as you are only making yourself worse and not fitter.
Asthma is usually improved by regular exercise. But you have to plan for it. Use the inhaler right before PE class starts, even if you don’t have an attack yet. Take it with you so you can use it again at the first sign of chest tightness.
Ask your doctor if there isn’t something else s/he can give you such as a brief course of steroid inhaler until your asthma cools down a little bit.
Do you take something like claritin every day? If you have hay fever every day then you should. Ask your doc which one it should be, and get a nasal wash such as “Simply Saline” to keep your sinuses from getting infected because of the drying effect of antihistamines. Befriend the steam room of your local gym also. Ask mom to take you in because you might have an attack in there. Best to go with someone who can help if..
If you feel best right after your shower, consider investing in a Vicks personal steamer or just learn the trick of “steaming your head” over a pot of hot water or tea. This is very helpful in the winter when the humidity level drops.
Put a few drops of eucalyptus oil on a handkerchief and sniff it. Wierd, but it works.