Almost passed out during ultrasound therapy for joint issues?
I'm really new to all of this, I only recently just told myself you know what I'm going to just go to all the doctors and see what they say and why I have this or that weird thing. One thing led to another and we have come to find out I don't have a high pain tolerance because I don't even feel the pain in the first place to tolerate it.
So today they wanted to try ultrasound therapy on my knees to see if I feel it at all and if it would help this weird sort of stiffness I have in them (we are basically throwing things at the wall and seeing what happens until I get appointments with geneticists). They told me they wanted to set it just a bit higher than what they would do for a usual patient and I basically felt nothing other than vibration. Then they went one up and I felt a very slight ache, but it was barely anything so they went one more up and I felt that and said that one was enough to be uncomfortable, but not unbareable, despite that they decided to go back down one and we just let it do it's thing for a couple of minutes. Then all at once I nearly passed out just out of nowhere. It felt very similar to chronic hypoglycemia episodes I have, my hearing sort of gets muffled, my vision bursts then starts to grey and darken, I shake, and my limbs go numb.
I was not in any outstanding pain by any means so I have no idea why I suddenly almost passed out. Does anyome have any similar experiences? Or have any sort of suggestion on what it could be so I can bring it up to doctors? More than one doctor has told me they suspect POTS- could that be related and if so why would that happen during an ultrasound on my knee?