Just to add...
When I was about 1 month Sober, my DH had a friend who was celebrating his birthday. They were going into the city and partying it up. I was initially going to go, and the more I thought about it, the more I just KNEW I couldn't go. The city was big trigger for me. Every time I went to said city, I always got trashed. I told my husband to go and have a good time, but I was going to stay home. I didn't mind him going without me. He's not a big drinker but he wanted to hang out with his friend.
I stayed home that night, and I was so glad that I had the strength to recognize that that was the BEST thing I could have ever done.
This doesn't even sound like an enjoyable occasion. You said yourself that your anxiety is UP! You don't have to do anything that makes you uncomfortable! Your comfort MATTERS!