Why Wont The Bell Ring!!!!

I am in 4th period at the moment  in the school library. Me and my friend go in here everyday because we do nothing in our class. I finished reading this romance comic book called "Blankets" that I would just leave on the back shelf until the next day of sitting in the library. It is 2:07 and the bell rings at 2:30 so I have a little bit of time left. My doctor appointment is getting closer every minute O_O and IT IS FREEZING IN HERE!
wish me luck...