My anxiety

I’m a 13 year old that struggles with major anxiety and panic attacks often. The last attack I had I was away from home and at a sleep away camp with friends of course they did an amazing job of helping me out and stuff but it took a while and it was one of the scariest things ever no reception so I couldn’t get in touch with my mom and was really embarrassed to ask for help from adults. I’m worried something else like this will happen any tips for just simply calming yourself down in situations like this?