Insanity: Is This The Real Life? Or Just Some Fantasy?

IS THIS THE REAL LIFE? OR JUST SOME FANTASY?
Until I see someone.
A pretty girl in white,
Almost ghost like,
Walks down a hallway.
All the breath I have is gone.
She is real!
By God how is this real?
Or is this some fantasy?
She turns the corner,
I follow her,
I see no one.
But I find a note,
Laying on the ground.
Penmanship on it is one I have ever seen,
I think.
Not a doctor’s.
To pretty.
I read it.
Only for a few seconds.
Then it vanishes.
Into thin air.
It only had the number “6” on it.