Could something in the grading have gone wrong?

I recently received my AP scores back and was very disappointed to find out that I had received a 2 on AP Government. I have never received less than an A on any assignment in this class, and scored 4s and 5s on all the ap practice tests. Our school picked two AP government students to tutor regular government students, and I was one of them. I felt extremely confident in my answers, and I am absolutely certain that I should not have received a 2. Does the college board make mistakes in the grading, and if so what should I do?

I realize you can get your multiple choice rescored, but I don’t think that will have any affect on changing my score, and will just be a waste of $30.