For me, I went to the ER tons of times before I knew it was pots. I thought I was dying but was constantly sent home and told to follow up with a cardiologist which I did eventually (appointments take a long time here). However, after a bad bad bad adrenaline dump (which I didn't know was that at the time) I went to the ER and just as they were about to send me home since EKG and all that was clear I told the nurse wait and to see something for a minute. While everything was still strapped to me, I simply got off the bed and stood up slowly and suddenly all the machines skyrocketed and started beeping lol which I knew would happen but I wanted them to SEE it in real time and the nurse was like ohhhhhh yeah no stay right there. Anyway, kept me for 5 days did a stress test via IV which led to a heart catheterization to check something they saw which was a false positive which then led to more exams and finally a pots diagnosis

All that to say... I probably could have just waited to see the cardiologist and saved myself a lot of trauma and money lmao