@MikeO This is really specific advice and that's incredibly helpful for me, so thank you so much for taking the time to write that out!
I did mention suspicions in my appointment request but in my experience the doctor doesn't even look at that anyway. I'll try to avoid specific names and just mention symptoms (without being too namey about it lol).
I have a BP/HR cuff coming today that I can use so I'll definitely do that.
I'm a little worried that I may not quite meet the criteria for POTS because in my own test with my watch (which is less, accurate, I know) while my HR did go up by well over 30 bpm (and over 120) it seemed to last about a minute and go down. I know an increase is normal but 30-50 seems like a bigger jump than it should be, regardless of if it stays that way the whole time. But who knows, maybe it'll change with the cuff.
I'm already on atenolol (for migraines) which obviously lowers my heart rate, I drink water nonstop and my diet is (IMO) quite salty. I'm far worse in the mornings, and I did this at 5pm so maybe I'm just too well compensated to see a more striking result. lol
(In case it comes off that way, I just wanted to say that I don't want to be sick. I believe I am sick and dysautonomia in general (and much of POTS) explains just about everything I experience when nothing else has. With POTS not being taken very seriously as it is I'm worried that other dysautonomic disorders are less likely to be considered. So I'm not hooked on one diagnosis, I just want to know what's wrong with me! Might end up having to fight my way to a specialist if I can find a way to afford it.)