Oh, I know what you mean Faye, I'm the same, and yes I too have concluded it to be a legacy of being in a doomsday cult. Where one wrong decision could result in a horrible physical everlasting death at armageddon, and being socially dead to all around you now.
They are pretty powerful reasons to be hypervigilant about pretty much every decision you make and obsess over errors.
I have found reminding myself that it's not about the mistake so much because we all make them, there is no such thing as perfection and mistakes are in fact how we learn.
But our attitude to the mistake, for instance making a note to self for next time etc etc then move on.