Instead of worrying so much, take time to review. If you are always worried about your grades, you will only stand still, because when you are worried, others may have mastered more knowledge. Remember, when you stop to have a rest, others are still running. For mathematics, rote learning is not effective, but you can try. You'd better find some difficult topics to exercise your thinking. Push yourself more now, and there will be a better future in the future. Come on!