I don't like people touching me. as a general rule i think all people are dirtier than me. if some stranger touches my clothes i get upset. is it ocd?

You may be, but: What ways might it help you to know you are OCD? That's the important thing - finding a better way to get through life. So, the description sounds close to a classic idea of some OCDs. Work w/ your therapist to learn skills to manage things in a successful way. You sound bright, so do some related reading to also help. Facts will do you good. You have a right to request not to be touched.