I still remember from five years ago getting a lot of prioritization questions on my NCLEX. I also thought I might have failed, (almost) everyone feels that way. You probably didn't fail, but even if you did, you just pick yourself up and go back and do it again. They don't specifically teach you prioritization in nursing school, so I advise nursing students to learn the basics well, and then they can figure out what is a priority from that. Good luck to you.