Ian - In response to whatever you mean by 'not adding up' I can't decide what you mean. Whichever way I take that, no, things don't add up, probably becasue I have a sleep disorder diagnosed, don't get proper or refreshing sleep, so when you turn up with each new sympton, a lot of what I am experiencing gets put down to non-refreshing sleep. Like I also said, attitudes and reactions from GPs have at times eroded my belief that something else might be going on (I mean it still might not be!) so that might give you some insight in to my hesitance in making yet another appointment to discuss another symptom (yes, I know I'm not going to get anywhere until I do this, I'm just finding this a big step, ironic really, as there is actually something a bit more concrete for them to objectively observe now in terms of my arm).
I know no one can diagnose me on here, it was just a last chance to air things before I have to face yet another line of investigations. PoTS symptoms are chronic and affect quite a lot of the systems in the body, digestion, blood pressure, heart rate, dizziness, heat tolerance, tiredness levels - I've been to the docs for each of these issues more than once over the years, and no one could tie it together, so even though I have this diagnosis (PoTS), I still feel a bit weakened by the whole thing.
I'll work things out though, I think I just need a few days to have a couple of words with myself and then I can annoy myself into doing something about it.