Maybe you reviewed too much before the exam and didn't relax properly, which is a bit like pre-exam syndrome. Believe in your own strength and you will get good results. Teach a little trick: take a deep breath when you get the test paper, don't panic when you see the problem, calm down and don't think about anything else, and do it seriously. You are more difficult than others, and math is not very bad. Why not believe in yourself? I have been in the same situation as you before! It doesn't matter if you take the exam once or twice. Why don't you do well in the next exam? People always make mistakes! Don't think about psychological hints, believe in reality! Come on! Wish you success! Get into a good high school and a good university! Although I am younger than you, I may not be able to personally understand the hardships of your third grade, but I will tell you my own method. Good luck! Come on!