I just stared my period and in two days I am going to a water sports camp. I have a really heavy flow I have to change a super plus tampon every 1 and a half hours, however i am doing water sports sessions that at 2 and a half hours each, with ten minutes break between then a half an hour lunch break.. They don't let you go to the bathroom  as it is too far away so the instructers would have to drive you on a boat  but they cannot leave the group so you are told to go behind a bush. I don't know what to do I'm really scared. My period ruins everything for, anything that is supposed to be fun and make me happy turns out to make me really anxious and stressed out because of it