Same here. I've always had some mild OCD but last year my car got stolen and that's when it really started. Before going to sleep I now have to know where exactly the car keys are, even though I'm both better insured and the lack of keys didn't really stop the thief last time.

What's worse is that while I've also always been a chronic key checker, last month I still managed to lose the keys. On top of that I didn't even lock myself out - either they're somewhere in the apartment(I'm at a loss here because I went as far as going through the trash - to no avail) or the single time my OCD didn't make me check if whether I left them in the lock I did just that and somebody took them.