I am stuck in a closet while a changeling runs around as me! Could this day get any worse?!

A filly wakes up to find that she doesn't know where she is or who she is. All she knows is that her name is Celestia, but that doesn't help much when everything is so dark and quiet.

:This story is my personal cannon. I didn't take it or reference it from anything so if you read this and get mad because you had the same basic idea I'm sorry because I HATE copycats and had no intenstion of ripping something off: