Is it normal that i'm achieving my goals but i still feel like shit?

Is it normal that I've achieved my goal of starting film school, but now that I'm here I just feel like I'm not doing well enough? We haven't even gotten graded yet but I somehow feel like I'm going to fail and do terribly, but at the same time I feel like I'm at a higher skill level than most of my classmates. I have more experience and more passion I think, than most of them, but I find myself wondering if I have "what it takes" to make it in the industry. I also have been feeling more uncertain and unhappy each day that I've been in school (only three weeks, but still!). I guess this is just a normal coming-of-age thing, all the confusion, but I want to check. If anyone has any advice I would love it. Thank you.