I don't have any advice, but just wanted to offer support. I also double-check myself a lot and worry that I'll cause something bad to happen if I don't doublecheck everything. Oven off? Sure it's off? Sure you checked right? Really sure I checked right? Email inoffensive? Sure there's nothing offensive in there? Should I add more smiley faces to make sure it's not offensive? etc. I hope you can find a way to resolve this issue to your satisfaction.
I have depression issues and that is the cause of lack of joy/etc for me. I do have flashes of humor and can enjoy myself for brief periods of time. Typically involving chocolate, unfortunately, lol.