I'm not that kind, but I try. You're on another level of kindness.
It might go away one day, but I'm not confident of that, to be brutally honest. :/ I would like to hope yours does, too, and your anxiety, because the world needs more people like you.
Yeah, the gathering would be on your mind but with any luck it won't be so bad. Just keep eating and you won't have to talk to many people.