How Did My Friend Beat Me on the ACT?

I don’t get it, and neither does she. We’re both straight-A students in school. We prepared for about the same amount of time before the exam (perhaps I even did more). We got the same amount of sleep before the exam. And yet, she got a 33, while I only got a 30. Frankly, I’m infuriated and must know what accounts for the difference. I do not take second place.

Do any of you know what is going on here? Could test anxiety have played a role? Could it have been pure luck?

MODERATOR’S NOTE: User already started a thread about his/her score on the ACT. Closing this one.