Next Door Nightmare

"I was in my debate class, and was super thirsty. I left the classroom to go get a drink of water, and then went straight back to class... Or so I thought. I walked in, took a few more steps, and then realized that the seating was different! I looked up at everyone, and didn't recognize anyone. The teacher in the room was going over a test and paused, and looked at me with her eyebrow raised. I mumbled an apology for interrupting and fled to MY classroom - one door over, and heard everyone laughing... So awful!"
Yulie, 13