The funny thing about OCD is that so many people have it, but think that their rituals and obsessions are normal...or maybe have a sneaking suspicion that they are not normal, but don't follow up on those thoughts and get a proper diagnosis.

There are some real "big ticket" OCD symptoms that, if you're suffering from them, you definitely have it. For example, if you have to turn the lights on and off or open and close the door a certain number of times, that's OCD behaviour. Of if you avoid certain numbers or words. Or if you have to keep checking to see if you've left something somewhere, and the checking doesn't help confirm your doubts (and might actually make your doubts worse).

There are milder symptoms, but most OCDers suffer from at least one of these sorts of things. People without OCD don't. It took me quite a while to realize that, as it does with a lot of folks.