Is This A Test? It Has To Be

New building.  Phobia of getting lost, and of unknown doors.  BIG FUCKING FUN, LET ME TELL YOU.  Turns out we got moved to the math department for a bigger room, and that's why we're not in any of my usual places on campus.  So I'm wandering small hallways, counting doors.  Doesn't help that it's an old building with weird acoustics.  Navigating the place has me so paranoid that I keep thinking I spot people behind me in mirrors or windows.  When I look straight at it, there's nothing there, though.  It's worse than yesterday, but maybe once I learn the place I'll get better.  Otherwise I'm going to have to see the campus shrink, or something.
Speaking of creepy, I found a notebook under my desk.  Turned it in to the department office.  Looks like mostly higher mathematics, but written on the back was "THEY ARE NOT MISTAKES, THEY ARE GATES"