This is my amazing daughter, Kai Bibeau. She has learned all this first-hand and knows what she is talking about.
POTS is an acronym that stands for Postural Orthostatic Tachycardia Syndrome. It is a real thing. Check out this helpful website:
https://my.clevelandclinic.org/health/diseases/16560-postural-orthostatic-tachycardia-syndrome-pots
Please pass this on if you know anyone with POTS. It will help them know how to help themselves.

God Bless Everyone Everywhere