Hi Thanh0than I know exactly what you feel. I felt the same way. the best thing is to know what is your score probably can be. Study hard improoving your problem Toefl parts and than take one or 2 LIKE_REAL_ TOEFL tests- the real score u'll get cant be worser than this one. And plus you'll feel what is that like to have a real Toefl test. Before the test day get a good sleep, take all your optimism and faith of your friends, focus on what u need to do and dont be scared. IT"S only computer and u on the real test!:) GOOD LUCK!