How long did it take to get a PoTS diagnosis?

to anyone who has been diagnosed with PoTS, how long did the diagnosis process take for you? i’ve been having symptoms for about two years, initially went to my gp for headaches, migraines and fainting episodes and was dismissed. i later went back after doing research on PoTS and i’ve been having testing done since then. these tests have been very scattered and very repetitive i.e “we took your bloods and they’re normal! let’s do two more rounds to be sure” or “if nothing changes in two months, come back”. its so frustrating because my symptoms are only getting worse, and i am receiving no support :/