Anxiety with 3 day school trip. ?

I have a school trip in april but i am really nervous to go. I went on a three day trip last year but before i left i was an Absolute reck. When i got there i was happy as a claim and had fun. The payment for the trip is due tomorrow and i don't know if i should go. I have anxiety problems. I went to go but i get so nervous the days adding up to the trip that i don't know if its worth what i have to go through.