first adrenaline surge?

Hey guys, i'm the process of being diagnosed with pots but i've had 2 doctors say they're 99% sure i have it. Last night, i felt a bit anxious all day but nothing major and i was laying down and i felt fine then all of a sudden i had this burning buzzing feeling start in my head and it went all the way down my body, through my arms etc. my heart was racing but it also felt like it was stopping at the same time as i had tingling in my chest. i shot up and walked around and it was such a scary feeling it felt like a "call an ambulance" moment... but it only lasted 10 seconds and i sat infront of the fan and it went away. I felt really nauseous and felt like i needed to do a number 2 as well at the same time. I did some research after and heard of adrenaline surges/dumps with pots but i've never had one before. It felt unlike any panic attack i've had, and like i said it only lasted 10 seconds. i'm still shaken up from it, my anxiety is telling me it's something wrong with my heart 😭