Thank you all for your very kind and reassuring words! It's amazing how much better I feel just by hearing about your experiences and telling me all will be ok. I will remember those words as I go in for my test...I must say I've been so nervous I've thought of canceling, obviously I have some anxiety issues!! I guess sometimes I wonder about going through with this b/c I do not have any history of fainting. My only symptoms that started me wondering about POTS are low blood pressure, becoming dizzy or lightheaded when I stand up after lying down or bending over, etc. Those are symptoms I never really paid attention to until I started reading about low blood pressure. I thought everyone was lightheaded after standing, and the dizziness doesn't last long for me and it's something I've always had so I don't know any different. I also get numbness and tingling in my lower legs and feet when I am laying down to go to sleep. My big problems in the last several years have been my supraventricular tachycardia and MVP, though if I had to list all my other strange medical symptoms that I have learned to ignore, maybe they would all add up to something in the dysautonomia umbrella. I took my pulse after I got up from laying down and it jumped 30 beats, not sure what that means but maybe a POTS symptom. I'm still trying to understand what POTS is and how it relates to dysautonomia, it seems to be a form of dysautonomia, am I correct? Here's a burning question I have.....if I have never fainted, how is it that I could faint during this tilt table test? I guess I don't understand what is so special about the first part of the test before they do the IV --you lay down and they bring you up so you are standing. If I don't faint when I stand up at home, why would I faint during the tilt table test??? Thanks everyone for listening and responding to my questions! Sarah (SJSB)