I've been monitoring my blood pressure and pulse. When I sit down, my pulse is around 79 bpm. As soon as I stand up, it jumps to 120 or higher. Yesterday I went to the grocery store and I could feel the tachycardia especially standing in line. By the time I left the store, I felt physically ill, weak, tired, etc. Just wore an event monitor for 7 days and waiting for results. I do have very low sitting blood pressure, like 109/66, but when I stand up, it seems to go up instead of down, so I don't get the dizziness that POTS patients complain about. EKG was fine and so was bloodwork. Anybody have any advice if this could be POTS symptoms?