Can dua help me achieve certain grades on my exams?

I have a really specific situation. I need to get a minimum grade of BBB in my exams however I feel as though I will get far from this. It is compulsory I get these grades otherwise I cannot continue with education. However I didn't finish two of the exams, so I am not confident at all. My question is, is there any chance through making dua and praying 2/3 of the night for a long time, and sincerely asking Allah to help me get three B's is it possible? I know with Allah anything is possible. However I mean is it realistic? I would need a miracle. I am desperate for these grades however I don't think it's realistic. What should I do? Prayer and dua is my only option.