Hmmm - I think you've hit the nail on the head in your message nurseboy. You seem to hold yourself together in the "life and death" situation - it's after it's over that the panic sets in. I've noticed this with my younger sister (someone who doesn't panic believe it or not!). She copes with all sorts of family dilemmas - she's one who needs to organise to keep herself in control - when the dilemmas are OVER, that's when she comes down with a migraine and has to take to her bed!! It's the "letting go" I think - I suppose it's similar to flight or flight.
I don't have any answers to what the best remedy is but the answers you've already received look good. Something physical and something relaxing. Or, and this is a hard one, whilst you're actually at work, maybe try to take time (just a few minutes) to let your body release some of the stress that it's going through - deep breaths, clenching your hands and breathing the anxiety out? Don't know if this makes sense nurseboy but GOOD LUCK!!
Wendy xx