What is that insecure feeling someone who suffers from OCD gets when he/she doesn't do the specific action?

I believe it's the feeling of incompletion. Why do you want to watch another episode of your favorite TV show? Because the end of the last episode left some open questions that you simply need an answer to. This is the same feeling a person suffering from OCD gets when the desk isn't oragnised or clean.

For me when someone hits something 3 times (an odd number) it drives me crazy! I feel incomplete haha, or if I see someone shoot a hoop and keep missing I need to see him or her get it on before I feel good, and I need all the small things like if I have batteries laying around to be in a perfect row! I can spend 5-20 mins doing it