Orthostatic Dysregulation sounds exactly like what I asked my Dr about recently! And of course I've had sleep issues my whole life, not much helps since it's based on racing thoughts and anxiety, other classic comorbidities.

I squatted, stood up, and the blood pressure monitor saw a drop and my pulse doubled 5 seconds later. It was trying to make up for lost time like my body had no idea I stood up.

Do you have any pointers to get more details? Since he didn't seem to know what it was exactly, we discussed POTS but that's a bit broad rather than a specific thing to treat it seems.