Hi Hillary
Welcome to the site.
Very interesting. This is just my take, but I would say you have a core belief around your specific field to do with excelling at it. It could have been built by you or some one you wanted to impress or just by pressure from some one else, a peer maybe.
So when you are doing what you are trained to do you worry and try too hard, which you don't have to do in any other job. This is performance anxiety.
You are good at what you do aren't you? You do realize being a perfectionist is destructive, being the best you can is constructive. No one is expected to be 100% even part of the time.
A couple of things to consider that are destructive. Are you competing with males? Are you competing with older people? Any other hidden things? Is this a high profile job where you have to look your best all the time?
I suffered performance anxiety when I developed Arthritis because I was very good in my field but it was physical and I could no longer be better than anyone else. Subconsciously it was destroying me. Panic attacks at work, attacks at night, attacks on the way to work.
When I look back at it, I was still better than my peers, just slower and that was what was killing me.
Here for you,
Davit