Can I make dua after exams are over?

Assalamu alaikum everyone. I just finished my 10th grade board exams and I'm honestly feeling really down about how they went. This whole exam period was a mess because of the war, so much stress at home, and my own mental health wasn't great. Because of all that, I ended up blanking on stuff I'd studied for months, and there were just too many personal issues making this year super hard to get through. I know the papers are already graded and they're putting the results together, so I'm wondering: is it still possible for my dua to make a difference? I'm really desperate to pass so I can move on to grade 11. If it is possible, what specific duas can I say to ask Allah for His mercy and for the examiners to be kind when marking my paper? Any tips would mean the world. Jazakum Allahu khair ❤️