Zombies are coming?

I've had dreams before where my brain was convinced I was in school and following a specific schdual. The theme with the schdual was my always missing one class because it was every other day and on the other side of the building. The thing is- I've had schedules like that before, but I am no longer in school. This morning I dreamt that I was in this room and I had just seen my grades for a semester and I knew I was failing for the class I kept missing. I was going to my mom to show her that. My brain was so convinced I was taking classes and failing, that I couldnt shake it off. I eventually get to see my mom and start to explain when I notice she is cleaning up, like she is leaving. I hear movement out in the hall and wonder what it is. I should have stayed in the room. There are undead in the hall. Some were even children- those kind of freaked me out. The next thing I know, I'm moving and trying to get out of the building. I'm not sure if I made it though. My brain seemed stuck on the idea of me missing class.