I need advice (TL;DR at bottom)

So I take AP English (I am in high school) and for our midterm we took the multiple choice section of an old AP English exam. In the past we did a couple practice sets of ap questions, and since I scored highly on them, everyone in the class has made the assumption that I’m extremely good and am the best in the class at English (for full disclosure I’ve never been very good at the reading questions, I don’t know how I scored as high as i did in the practice sets in class tbh). On our midterm I scored 45/55 which I am completely happy with considering how I typically have a hard time keeping focus on these tests. People expect me to have the highest grade, and while I have one of the highest grades as far as I’ve heard, somebody beat me and got a 48/55. I am in no way jealous of that person and I could care less that they scored higher than me- honestly good for them, I’m just happy with what I got. With that being said, tomorrow in class once people find out that I don’t have the highest score, everyone is going to freak out and make a big deal out of it (it happened when I missed 2/15 of the set of practice questions once and everyone was freaking out and somebody even said “guess **my name** is garbage now”). I honestly don’t really care that much but everyone makes such a big deal out of it that’s so unnecessary. I’m looking for advice on how to act when people overreact so it doesn’t look like I care when I really don’t.

TL;DR: as the designated “smart kid” in the class, how do I act when people start jumping up and overreacting when I mess up on something small without looking like I’m triggered?