From personal experience, I can tell you that it is always scarier to watch the grade above complete their exams than it is to take the exams yourself.
Don't get me wrong, exams can be daunting for the students taking them, and speaking to others about them does make it easier to cope, but that's no reason for you to feel as if you're behind.
For now, just focus on finishing content and revising each topic as you complete it in class, rather than cramming at the end of the two years. As long as you revise consistently and complete as many past papers as possible before the exams, you have no reason to stress!