Oh dear!!! what a little worrier you are!! Is this the first time you are taking an exam? You are obviously in school and have taken many tests and exams before so it should not be a problem at all. Initial anxiety may sometimes make you feel and worry that you might forget what you have read, but I promise - YOU WON'T. Eat a good breakfast, eggs, fruits and milk, dry nuts et and go to the exam tomorrow and come back and tell me how well you have done!! Go boy, go! You will be fine.