I'm really upset/stressed, how do I keep motivated?

Are you talking about the high school exit exam? Okay don't worry you are going to do so good. I only missed one question on mine and I'm really just an average student with B grades usually and sometimes A's. Can you clarify your question perhaps? A perfectionist can be really good. Don't worry about classmates getting annoyed of you. Basically they're lazy or don't try hard on the homework. Really just do your hw once perfect the first time, b/c the end result will probably be the same. Also, if you studied hard, believe in yourself. That's all there is to it. Motivate yourself to do good by rewarding yourself with an affordable luxury like candy, new clothes etc. Have a rival to compete with. There are many possibilities.