Great to hear that you're doing better, Brian! I tried Floudrocortisone two years ago and had the same effect but it disappeared after a couple of weeks. That's quite common in adults, I hear. Glad you seem to be an exception!
I'm not doing so good. Gut issues made me stop B12 protocol and D-ribose (allergic to vit C , ALCAR and ribose, very strange) so I'm going down. And orthostatic problems are a big part of that. The energy I get from B12 and ribose (and ALCAR, caffeine etc) make my blood flow work but now... I'm thinking about stimulants again. Vyvanse increases noradrenaline in the brain, maybe that might help if my problem is similar to yours.