Oh ! You can’t be so nervous! This is very dangerous for the body! In fact, exams are not the worst thing. Especially if you don’t pass them. But it seems to me that you sleep more. But I do not know what else to do. But I think there is a person here who will advise you something sensible. Good luck to you, my friend. And yet it seems to me that since you are preparing so hard, you will be able to pass everything!