It’s my teen son that is suffering from this. We have had him in for asthma testing, and for about a year thought that it was asthma. Like you, better testing (and a better Dr.) came back that it was not asthma. Which made scenes as the inhaler and the allergy meds were not helping. He does the mouth cover, this helps. What really gets him is the short warm-up and then jumping right into high intensity efforts. Air temp doesn’t make a huge difference. He ended up in an ambulance last summer 10 min after a race start in 80 degree weather. Were going to try extending and lowering the intensity of his warm-ups (tough for a kid). When his EIB kicks in, its completely debilitating. The only thing he can do is sit and breath thru it.
What ant-histamine are you using?
Thanks Captain!