Please help I am having an emotional breakdown!?

Ok so i am a 13- almost 14 year old boy and I don't know what to do with myself. I am in 8th grade. So i am a smart kid and I am in Advanced math and advanced science. So my Math and Science grades go into my GPA. So recently I have not been doing so well in Math. My parents expect 90s and above from me. And I got an 82 on my math test. They were enraged. And I recently had another math test which we didn't get back but i don't think I did so hot on it. I am really nervous and I don't know what to do with myself. I am really freaking out. If I don't get a scholarship for collage I wont be able to go because My parents just don't have the money.