The ironic thing is you understand your problem better than most ever could. After years of suffering from anxiety and keeping it to myself I had a co-worker bring up his experience with anxiety, man what a relief it was to speak with someone in the same boat as myself. Not feeling like I need to conceal my anxiety so much really helped. Last experience was up on a lift rigging an elevator position indicator, (what if I pass out, what if I fall), screw it I told the guy I was working with "hey I am having a ****ty day and really stressed out, I just want you to understand if I flake out on you" it helped.
I understand your position is different, I hope my sharing helped a bit.
One more thing to add, obviously the anticipation of anxiety is the main driver of anxiety. When I am put in a real stressful environment I have a clear mind and become the alpha while many around me crack up, it is only afterwards that the anxiety strikes again.