The Ninja Epidemic

You hang up real quick like. Smooth. There is a brief awkwardness before you start to walk away from the phone to get some asprin for your rediculously bad headache. Just as you take three steps from the phone, it rings.

You answer it. "Hello."

It's the school secretary. "Hi we had a report that (your name) was called off of school today, is that right?"

"It sure is." You reply.

"Okay, thank you." She hangs up.

That was almost too easy. You make your way to the bathroom where you keep the asprin. The asprin bottle is behind the mirror, you open up the medicine cabinet and take out the bottle. As you close the mirror/door you see a black shadow of a figure drop silently from the cieling behind you, to land beside the tub.

You turn around and see nothing. There is a small space between the tub and the wall where it may be hiding, whatever it was.

What do you do?