I have OCD as well, diagnosed when I was in my late teens. I don't do the obsessive cleaning thing, I'm not the best housekeeper. But I can't have doing my laundry, or my dishes, or cooking my food (I almost never eat out for various reasons, and this is one of them; I don't mind mum cooking, though). And if anyone rearranges anything or borrows something and puts it back out of place, it drives me up the wall.
It's interesting reading a post about other people with OCD! I do the checking thing as well, and the pushing the little buttons on top of soda lids (to avoid this i never buy drinks from places with those cups so I never expose myself to them now) 🙂 I also have to be on time, and I hate people touching me in anyway (it's a lingering germ thing, which I've mostly managed to control but there are still things). And I never touch door handles or rails with my bare skin. *shudder* Does anyone else count? I don't do it out loud (at least I think I don't) but the first couple times I'm at a new place I count everything and embed it in my head.
Anyway, it's the source of my chronic anxiety and panic attacks, because people do not act in the orderly way I should like, and I can't handle interacting with them in person. Not unless heavily medicated, at least. And the anxiety is part of my insomnia. Even with medication I still rarely sleep more than a few hours at night, but at least I don't spend the rest of the time worrying about everything.