Is this really OCD or am I just over-thinking?

You can't give a diagnosis to yourself as many signs and symptoms of mental health issues can overlap in many different mental health issues or disorders. Repetitive behaviour seen in obsessive compulsive disorder can be seen in behavioural addictions too and if you have got them from early childhood, it can be also sign of autism spectrum disorder. It is why you can't diagnose self. I suggest you to write the signs and symptoms which bother you on a list of paper, write down also how intense they are, how often do you experience them (be precise - write how many episodes are daily, weekly, monthly), and how much they disturb your daily living. Then get a appointment by your doctor and tell to him all your symptoms (written down on before mentioned list of paper).