I've been dreaming bad things. Help me!?

I've been dreaming about bad happenings in my dream and it's about school. It's been a week now and I don't know if I'm just really excited for our school opening or it has interpretation. My dreams are about me panicking, getting out of place and some really things that really won't happen in school. Um. In school I'm that nerd type of guy who is always ready. But I don't know why my dreams are that.