The Number 13

I am being stalked.
not by a man,
not by any person
but by a number
To be specific,
the number is 13.  
It shows up everywhere,
I have yet to figure out
what it all means,
if anything.
It shows up in the weirdest places,
from carvings on piers, concert tickets,
restaurant slips,
gas pump prices, tattoos,
flight tickets on my trips,
Airplane arrangements,
Stock cars, t-shirts
radios, hospital rooms,
prices, apartment numbers,
banners on internet clickers,
signs for billboards on the highway.
even times on microwaves
and simple wall clocks.
What does it all mean?
Some think I'm crazy,
that I've just lost my mind.
That I've implanted the number
in my head, that it's something
that I'm trying to find.
But that's the thing,
the thing I find most baffling,
is that the days will go by, and
I will forget about it.
Then I'll look at the calendar,
and lone behold, it will be the 13th.
I never was supersticious,
or when it comes to numerology,
even the slighest bit cautious.
But this number seems to be running my life,
showing no signs of positive or negative.
It just is.
13, what message do you have for me?
what do you mean??