Do you think I have OCD?

it's possible. you should go seek help-- psych specialist or (if youre still an adolescent) even your school counsellor or any trusted adult for that matter. it's not just about having ocd(you may or may not have it) but if you think that your behavior is disturbing you and is not giving you a high quality of life then opening up about these problems to these people may be a step for you to deal with these concerns.