My writing muse is much like a cat. Only really does stuff when it wants to, and will constantly claw at your skull unless you address it. Of course, by the time you actually address it, the muse will suddenly lose interest.
This is way more common than you think. If you're crazy, then we're all crazy. Something is happening that we can't explain. I remember things happening that no one else remembers. I ask where kitchen utensils have gone and get met with a blank stare. I'm not mad. You're not mad. This is really happening.