I’ve got the same thing!!! I really think it’s time we got all together and head up to MAYO TOGETHER! My daughter also has this. Many days we have it at the same time. One day we went in together and the doc said - Allergies, and to use Nose spray morning and night year round, as well as an allergy pill OTC and to see if that will help. But what we have noticed is we also get this from caffeine, including chocolate, as well as not getting enough sleep. So obviously that can’t be just pollen allergies and strange timing... When I asked about that I got the “panic attack” come back. I told him when this first started happening yes I panicked. But after going to the ER 5 times and realizing I wasn’t going to die, seeing a heart guy, lung guy, allergy guy, I’m well versed. I’ve tried the breathing and the breath holding can help a bit. I got frustrated with doctors and stopped trying because I was told to go to a councilor or breath into a bag, when I’d already done all of that and have a level head. I’d even entertained that and did their medicine for anxiety and nothing changed. Same with asthma meds which felt like made it worse. Anyway, if you have others like you, me and my daughter that you keep in touch with I would love to be added to the list. I can’t give up now that my daughter is going through this too 🙁 maybe with enough of us together we can figure this out.