I think even with your 40 point HR swing , 45-95 bpm,
it would be classed as ‘normal’ ie under 100, in the UK, though might be causing your fatigue, it wouldn’t be treated. Though you might find self treatment for PoTS might help you. Unfortunately my Bp is ‘normal’ at rest but can easily be in 70-99 range, yet shoots up to 135 with minor ‘exercise’ eg putting coat on, a brief trip upstairs to toilet…. I haven’t found anybody on various LC forums who have, or solved, the problem of hypertensive BP at rest, but hypotension on standing, which is what seems to drive my high HR.