Aom's Dream

In my dream I was studied social and the teacher was told us about the score of exam. I was very excited and then the teacher told us about the high score of exam.Yes it was me!  I'm very happy. But in my real life when this time was come it wasn't like my dream... My real score was very bad. I think I have this dream because I don't like this subject and I hope this dream won't  happen with me anymore I think when you have a good dream is mean you going to have a bad news like me! In Thailand we believe If you have a bad dream is mean you going to have a good news.