Everybody worries at times. It’s normal to worry about things like school, how you look, what you said or did in a certain situation, how your parents will react to something you did, or what the future will bring. But OCD takes worries and doubts to the extreme.
For example, most people have thoughts about others spreading germs or doubts about whether they locked their front door. Usually these thoughts crop up and then disappear. But if they keep returning and cause you a lot of anxiety if you don’t wash your hands or repeatedly check the front door, it could be OCD.