I’d say you should worry about it all you want beforehand, but make sure to go, and make sure to leave those thoughts at the entrance. These thoughts/emotions are there for a reason, but IMHO they are more useful for preparation, not for the event itself.

I sometimes even mime putting such intrusive thoughts into an imaginary box, locking it with a key, and setting it down somewhere, or tossing it over my shoulder. This sort of ritual helps me to really cement my intention of leaving something that I no longer need behind.

Also, having you wife with should be a great help, for obvious reasons. But really you are an adult, as long as you don’t show up in a sailor moon costume I doubt if anyone will be paying much attention to you at all.