Qualifying exam for A-level

My qualifying exam is starting today. Today's paper will be Sociology. I'm so nervous! I did my revision already, yes. But, I'm not confident if I can remember everything later. I need to pass this exam because if I fail, my parents will have to pay more than $300 which is a huge amount for a not so rich family like mine. I want to do my best for my parents' sake and everyone around me. I want to make my parents and teachers proud. I want an A for all my subjects. But, I'm scared. I wonder if I can do it. The last assessment, I got only 140 points which is very low. I can't even apply to University with that low points. I need to get at least 220. Everyone, please pray for me. I want to pass. I need to pass. I have to pass. I must pass with HIGH points.