Earlier quoted context omitted.
Friendly advice, find a few people you respect on the subject and ask them to review it. Wards off a lot of the anxiety and will generally make your work a lot better.
I'm sure that's great advice, but I don't respect anyone. :(
Even if your work is on something fairly esoteric, you can almost certainly find someone qualified to review it on technical grounds, even if they're not an acknowledged expert in the precise topic you're writing about.