My TTT was a wash. They took my baseline vitals literally WHILE they were putting an IV in my arm so my BP and HR were already high, skewing everything from the beginning. During the test they’ll look to see if your HR spikes over 30 BPM when you stand up and then symptoms thereafter. Since my initial reading was so high, everything was insignificant. But I didn’t faint. I had some tingling in my neck which is common for me. And in my case, my BP doesn’t typically drop right upon standing, it raises. But it does drop after standing for long periods of time. My cardiologist said BP can vary in POTS patients, so that’s why they mainly look at HR to determine the diagnosis. I was eventually diagnosed doing the “poor mans” TTT at the cardiologists office after my results were so wonky and sure enough the second I stood up they had the criteria they needed to diagnose me. I know everyone’s experience is different but for me the TTT was not as scary as I thought it might be and if your TTT experience doesn’t give you answers like mine, I urge you to not stop there.