... like they need to get out of their own skin and be somewhere else?
That happens to me too - during meetings, or wherever really - there doesn't seem to be a pattern to it. If conditions permit, I can distract myself until it passes, yet the conditions are not always good for that. I just take it one minute at a time at that point and am glad I made it to the next minute and repeat until I can finally get out of wherever I am.
.Also, I have found myself counting when I didn't even realise...
Yeah, I mostly count things I pass - like parked cars, or parking spaces, lamp posts, things like that. I don't know why but it makes me feel better for some reason. I also find myself rocking back and forth at times too - but only when I'm alone - but when I am doing it there's nothing quite like it. I feel so much better when I can move like that - free of worrying thoughts - clarity of mind.
Just take things as they come along and don't worry about them too much before they happen, but talk with your doctor about this in case it's an important signal to your doctor to change something about your treatment.