What's wrong with me?

Okay so something's been happening in school lately. It's always random but I don't know what it is or how to prevent it. It always starts with me not being able to consecrate on anyone that's talking to me. And then I feel dizzy. Everything feels like I'm going too slow and everything else is going fast. But when I try to speed up, everything goes slow. While I'm trying to stop it, I hear screams. Like arguments. And I don't know what they're fighting about but they're screaming at each other and I wanna scream but I'm in class. How can I prevent this? Please tell me I'm not crazy. It's been feeling like I am.