The whole dream is exam phobia, it's no big deal.
You should be the kind of girl who grew up in a bad environment. You are not allowed to make mistakes, be afraid of risks and try to avoid them. Are you sure there will be no problem in this exam, because a top student like you must have a bottom line for his mistakes, but there will be problems in the long run. There is no definite paper on the road of life, and there is no absolute score of 100. At that time, you can't guarantee that you won't make mistakes, so when you finish the exam, you must adjust your mentality and accept some mistakes and imperfections, otherwise you will be very tired, even more tired than now.