I’m starting to regret my decision

Im currently at meps waiting in my hotel room. Tomorrow I do all the medical stuff. I’ve been dreaming about being a marine for like over a year and now that I’m beginning the process, I feel scared. Did anyone else feel like this? Worst part is that I didn’t even tell my parents I’m here so they keep spamming my phone and it just keeps making me more nervous. Idk I’m just venting I guess and I assume this feeling is normal but the weight of everything is crushing me rn