Pregnancy paranoia is ruining my life! what can i do?

OCD not paranoia: I suspect what you're describing is an unrealistic fear of getting pregnant. That's not paranoia, which is delusional thinking. It may seem like a trivial difference but what you're experiencing is more likely obsessive thinking which is a form of anxiety. A well-trained therapist should be able to help you. Another more rare form of this is seen with anorexia nervosa; i'm assuming that's not you.