Breaking down post-exam

I took an exam and I studied hard for it but I feel I did horrible on it since I left two questions blank. My mind went blank and I kept making mistakes on the calculations (you can tell if you are.)

This course is required for my program and if I don’t pass I may have to do another year. I’m genuinely so nervous about whether or not I passed the course bc this exam is very dependent on whether or not I pass the course.