I can feel the frustration in this comment. Theres a moderation, between being a slut and being afraid of it.
There's nothing to be ashamed of, and you can't rush it.
People who are sensitive about it need a good first time more than anyone, a friend of mine had a bad first experience with a guy and she still has negative feelings because of it. It's important to recognize you're afraid, and instead of thinking punishing thoughts like that, come to an understanding that it's not your fault. You can work on it, even without a partner, in many ways.