I've had dreams where I'm back in high school or middle school, and I'm in trouble because I realize I haven't gone to class all year and I'm going to fail. These probably have something to do with anxiety about going back to college. I'd say if these dreams are bothering you its probably related to some stress currently in your life.
Try telling your dreams to a close friend to see if they have an idea of how to interpert it. I've done this a few times and its amazing what was right in front of me that I couldn't see on my own.

Lowercase has the best advice though, relax