There does not appear to be a term for this. I propose
"protypophobia", in keeping with the Greek roots used for
similar terms. This, in my humbe view, is so obviously the
correct term that failure to find it in searches of the web implies
to me that your condition is rare. You are not alone however.
|I'm afraid of heights and dogs and normal things like
that, but one of my close friends has the coolest phobias ever.
She's afraid of empty abandoned office buildings, and patterns.
As far as I know, there isn't even a word for the fear of patterns,
but she had a serious problem with an orange that had cloves
put into the skin on a regular pattern. Something about that
frightened the hell out of her. Maybe she was attacked by
wallpaper as a kid or something.
(You may find that site a useful resource)
Whether or not it has a name, if your fear is affecting your path
through life, making you uncomfortable, or limiting your choices
in any way, it IS serious.
As a first step, I suggest that you discuss this with your usual
medical adviser. I would expect that there would be a referral to
a psychologist or counsellor with a view to gradually defusing
the associations that you have with some patterns.
I wish you well - if nothing else, you may enter the medical
literature as the index case for protypophobia!