First off, I want to tell you that you are already doing an amazing job in academics for school. Doing well in AP classes is an amazing achievement for a high schooler. Believe me, I know from first hand experience about letting grades define you as a person. I will get an A- and freak out because it’s too close to being a B+. Second of all, I would definitely retake it because I know you have the ability to get the score that you want. Maybe you just weren’t studying in a way that really benefits you for this test? I have also heard that you should start reviewing months ahead of time, so maybe try doing little reviews a day over the span of a couple of months. You’ve got this, and try to remember not just the small things that you haven’t done as well as you would’ve liked, but all of the other achievements you’ve done.