Auditory Hallucinations

OK, so I am laying in bed internet browsing when I realize I hear music. I am not the type of person who usually listens to music when I am alone in bed, but slowly my focus shifts to hearing this lullaby-esque type music. It was almost like there was an ice cream truck outside which seems highly unlikely since it's 10 30 at night and literally freezing outside.

Weird.

I try not to be a hypochondriac as I know these types of hallucinations are pretty common, but still..

Very weird.

Of all things I wonder why lullaby music.

Had to read about it of course. I am feeling rather discouraged from my new found knowledge.

http://en.wikipedia.org/wiki/Auditory_hallucination

Maybe there was an ice cream truck...