When i stand up quickly, i feel pressure in my chest
and head, and my heart beats really, really hard. Not fast, but hard. It goes away
after about ten seconds, but it is horribly uncomfortable when it happens. I know that I have orthostatic hypotenison. Could this be the cause of this? Should I be worried, or would the tests I have already had have shown something if this was something to worry about? I can't stop worrying about it.