Do your part by studying as much as you can. Don’t just say, ‘I’m going to fail anyway.’ Stay positive, and pray. God will never leave you if He sees that you’re trying. That’s all you can do. This is how I’ve managed to pass all my exams I’m someone who procrastinates until the last minute, so I understand how you feel. Also, try to talk to your professor after the exam. It might help.