Hey Kali! I'm new too! Yes i get that a lot. When I was in the ICU, everyone was shocked becasue my heart rate would change so much frequently. I think it's just a POTS thing because I have had several echos, EKGs, Stress tests, holter monitor and everything was pretty normal. I have had it where you can see my chest pumping and it feels terrible. Also, when it gets really bad, I get this rash. My skin gets really blotchy but it's not itchy or painful. I would not have noticed the rash except i was in the doctor's office and he took pics of it. Everything about POTS is SO weird. Good luck