Just wanted to let everyone know that pre-exam nerves are completely normal. Everyone gets nervous, worried or anxious, especially about these kinds of things. As long as you set enough time to revise everything throughout the year, do enough practice exams, get feedback from teachers and keep calm without overloading yourself, you'll be able to excel in the exams.
Please be sure to set enough time to relax as well. Maybe a quick 20 minute walk around your neighbourhood, or stretches in the backyard, as long as you get outside and keep active. If you're going to stay up late studying, please have an hour between study and bedtime, otherwise you won't sleep well. Listen to music, play some games, or even read a novel. The last thing you want is to fry your brain and/or show up looking like a sleepless zombie.