You know you've got DID when you can't remember any episodes of Elfen Lied or Chobits because animes are one of your alters' triggers.

You know you've got DID when you walk out of class and suddenly don't remember any of the material or what the homework is.

You know you've got DID when you end up drawing full out art instead of that funny little stick figure comic you meant to draw.

You know you've got DID when you're mysteriously broke and there are two new dresses you've never seen in your life folded up neatly in your dresser drawer.