Thank you for your replies.
I did go to the event, it was made easier by the host suggesting I go early and help set up. I found this really helpful as I was able to get there before anyone else, become accustomed to the surroundings, choose a seat by the exit and not have to walk in a strange environment full of strangers.
Small victory.
I did notice that I really had to fight the urge to "zone out" and stay present. I did struggle and I cant say I loved it. I was the first one there and the first one to leave, but the sky didnt fall down and it was ok Yay!
Thank you again
Clare x