I have been trying for years to figure out what is wrong with me for years. I have found that I have many symptoms of POTS, but of course POTS has tons of symptoms. When I get up from lying down I do sometimes get a big increase in my HR, but most of the time its not big enough to fall under POTS criteria. However, I have noticed something odd that does sound similar to what most people here have, only in reverse. If I stand up and do something to really get my heart rate pumping nice and fast and then lay down suddenly, my heart will pause, then start beating very slowly and what feels like a bit more forcefully. It basically immediately slows down from the excited level. If I stand right back up, it goes back up. Does this sound like POTS? Thank you