@James_80. Yeah. One model of mine, is that my fight-or-flight-or-freeze response has gone haywire and is permanently stuck on. Heart racing. Dead feelings. I get better by running, I get better by lying down. Both are actions you do to escape danger.
@DPCat. None whatsoever. I know some with POTS actually feel worse on beta blockers. I got no effect from it, besides a heart that didn't beat so fast, which never has bothered me anyhow.
My health is poor, hence the late reply.