Welcome to HCM,
I think you are developing bronchospasm
same as the asthmatics suffers. Do a spirometry
You would better start, antihistaminic+mast cell
stabilser combination as prophylaxis and bronchodilators + inhalational steroid
combination if you are suffering it now. I can't write the medicine as it is not allowed in HCM.
Anyway, here in HCM i always advise to go to a doctor before taking any medicine.
Wishing you an early recovery