Camp half blood: how are you alive?

You’re 17 an age a normal demigod wouldn’t survive if they weren’t on camp half blood or camp Jupiter but you did, and you just showed up with your clothes ragged with a mix of dried and fresh blood that you don’t even know what’s yours and what is from the monsters you killed. You only have a sword and an old bag with you. You’re numb and don’t even know where you are or what is this place. All you know is something pulled you here and maybe now you may stop running as you did your whole life.