Fight or Flight Mechanism

Hi Russ, I had a similar experience, though not to the same degree, when I was playing pickleball. My numbers would creep up over the 2 hour period without having eaten any food. I am very competetive and had high expectations of myself, as well as not wanting to let my partners down. So , though I love playing, I definitely felt stressed.
Here is something I tried the last time I played- I sat a game out, rested and had a talk with myself. I told myself that this was not a stressful situation and that there were no terrible consequences to performing badly, and that it was just a game. I did some slow breathing, and when I got back to playing I deliberately tried to relax and keep myself calm. So in other words, i was being mindful , and trying to “trick” my body into not interpreting my sudden movements and swinging and hitting a ball as some fight, let's say. I think it had a positive effect, and i am going to try that again the next time, right from the start.
Might this “mind over matter” attitude help you? (Though your experience is much more extreme than mine) It would be a pity to give up something you enjoy so much.
One other thing- I heard that drinking water is important especially when one has high glucose numbers.