Thanks for your replies, I’m seeing an autonomic/endocrine specialist in a few weeks and will ask if I can get tested. I’ve also had mild scoliosis too-remember being given exercises in primary school to try and straighten my back out. It’s amazing reading the Driscoll theory as I’ve had nearly all these symptoms. I have started the antihistamines now for 3 weeks and I have improved significantly, so much better, thankyou Dr Diana! Feel like I am finally getting some answers after 4 years! The doctors look at you like you’re mad when you ask to be tested for mast cell disease and they barely know what POTS is, but I am just glad to find something that is finally making me feel a lot better!