If you dreamed that you could not make it to the exam: If you can put forth your best, you will not regret it in the future, you may become a little stubborn. To see that you can't make it to the exam in your dream refers to being unhappy, going through a difficult period and changing your life, not being able to think logically and having to postpone your plans. To be sad because of not being able to take the exam in your dream is interpreted as a news that you will be happy soon and a successful life.