I think I’m having an anxiety attack, my chest and stomach are turning, I can’t sleep, I’m super stressed, and Idk what to do

My friends started planning this party and I said I would go but now it’s out of hand. They decided to rent a cabin to go get drunk at and expect everyone to pitch in for the fee and I initially said I would go and pitch in but now I’m so anxious bc I don’t want to go and I feel so trapped and scared. I told her I don’t want to go anymore and she hasn’t texted me back but I think she’s gonna be mad at me. Ik it shouldn’t matter but I feel so in over my head. I told her I would help and drive people down there bc she asked if I would but now I’m freaking out! Idk what to do. I just want to curl up and cry and I don’t want her to be mad at me but I’m just not ready to be in a situation where everyone around me is drunk while I’m sober. I mean they want to get wasted and play drinking games while we’re there and I don’t feel comfortable going. I just idk what to do and all I’m doing is panicking.