Ask the superior to solve the nightmare

Don't worry too much about your dreams. Scientific research has no good explanation for dreams. According to what you said, I'll give you an analysis and give you some suggestions:

1, you are nervous about the school exam, even afraid of it, so you may often think about it and even dream about it.

2. Your grades are not ideal, which may be related to your distraction in your study, but you are vain and often think more of yourself than others, but you have not made corresponding efforts.

Your relationship with the people around you is not very harmonious.

I suggest you learn to get along with others and get along with others sincerely.