Not diagnosed with it, but I sure do have a lot of symptoms of it, ever since I was a little kid.
One of my first obsessions involved the number 3. If I said it too much, looked at it too long, or even thought about it too much, I was afraid bad things will happen, like growing a 3rd leg. Throughout the day, I’d repeat a list of things I did not want to happen, and the List eventually grew to be quite long. Often at night, I’d be awake because I felt that no matter how I repeated the List, I didn’t do it good enough to guarantee those things won’t happen. Later, I moved on to other stuff.
_________________
Life ... that's what leaves the mess. Mad people everywhere.