How do you balance a demanding job and studying?

Hello everyone, I just want to share the inner thoughts of myself, I am a student and also doing job, My boss just gave me a massive project that is going to take up all my free time this month. I have my big certification exam scheduled for next monday and I am freaking out. I have absolutely no time to review my notes and I am terrified of failing. I was so stressed today that I actually wished I could pay someone to take my PMP exam for me just to save my career and future. I just want to know am i doing right or how do you guys manage work and study?