Missing Class

This post isn't about a specific dream but rather a recurrent theme in my nightmares. Actually, it even happens sometimes in regular dreams. I realize that I was signed up for classes that I'm not sure I've been attending. Sometimes I just can't remember when I'm signed up for what class. Sometimes I know what classes I'm supposed to be in, but I can't figure out whether I've been to them or not or how many classes I've missed if I know I've missed some. Sometimes things keep me from checking into it all, and sometimes I'm trying to figure it out at the school but don't know how/can't find my schedule/etc. Drives me nuts!