A small talk with your buddies might help you to stop worrying about your exams. When you discuss your situation with your friends they might help you to find the solution. With support, they will also help you with study advice that can help you in your exams.
In the end, marks are not the only criteria which will decide your future so take your exams in way of learning rather than focusing only on grades. Never be afraid to talk about your issues with your family, friends, or any professional as they might help you to get out of this period.