Avoiding Family/social gathering

I have a family gathering/function that I have to attend in March. I would have escaped it if only it had been a one-day event, but it’s not—a whole week has been assigned for the drama. Being left behind in life right now, with loads of setbacks and failures, I see myself being judged there. And to add icing on the cake, they are just a bunch of show-offs bragging about their money or how successful they or their relatives are. I have come a long way in dealing with my panic attacks and all & i can manage it better, but still, I just don’t want to go. There’s still about a month until the event takes place, but I have already started feeling anxious(i start sweating uncontrollably in this social situations). It seems as if the world is going to turn upside down Or I am just overthinking again. I’m sure you can relate. Guide me!!