My certification exam is in a few hours, and I'm so anxious that I'll end up pulling an all-nighter

I'm taking the Fire Protection Facilities (Electrical) Engineer exam this morning, but I'm so nervous that I'm just staying alone at the study cafe, reviewing everything I've solved over and over again.
No matter what exam it is, the pre-exam jitters are always the same, haha.
Anyway, good luck to everyone!! haha