Hi Pistol,
Thanks for the reply. I will ask my GP to do the test and hopefully they will be helpful, this will be the first time visiting this surgery. I'm not sure where you are located but in the UK I have to see my GP first who will do some tests (probably bloods, Blood pressure etc), they will then wait for those results before deciding if all is okay or if they will refer me to a specialist. I know there's a POTS specialist at a nearby hospital so if they are willing to refer me I will ask to be refereed to him.