OCD

hmmm.... what are the symptoms of Obsessive Compulsive Disorder (OCD)?

i realised that i can't help but arranging things on the shelves in the supermarket when they're not in order. that includes straighting up clothes and small boxed items on the rack.
but after trying on clothes in the fitting room, i'm fine giving back the shirt and the clothes hanger separately.
i even think that, being annoyed when people always running late without a good reason falls in the same category. because so many of my friends are doing that until i question myself for being punctual! :S what kind of theory is that?!?!
and perhaps i can also include the fact that i'm not very good in handling last minute changes of plans.

are they all related to OCD??? or i'm just a control freak.