I agree that you didn't do anything wrong. The people who are laughing at you are the ones who should be ashamed--you were just trying to experience life. I think you were brave and may have learned something. It feels intense because it is your first time and with time, hopefully you can chalk the whole thing up to youth and inexperience--you have to start somewhere and it's not always graceful. You are not alone, my first experience did not go well either!