Whoa, girl. You may have some unusual sensitivities in your genital area but that doesn't make you a freak. The more you talk about this relationship, the more it seems like this could be much more of a relationship problem than just a sex problem.

If there's an element of coercion/force there's something not working right and it's in the relationship, not in the genitals. If he's not letting you say no, I would really strongly suggest you slow down, say no, and start talking.

Are you sure you really want to be with this guy? You're sexually inexperienced and so is he, even if he's had sex before. He may not have a clue what he's doing down there except trying to jam it in. There's no reason for you to see yourself as freakish just because your boyfriend's a lousy lay. Yes, I said that. I'm saying the problem is just as much him as it is you. There's no reason for you to take the blame for his lack of gentleness and his coerciveness.

I'm sorry you've had this unpleasant introduction to sex. But the more you talked the more this sounds like a bad relationship, not just bad sex. It's probably bad in other ways, too. I hope you won't settle for bad treatment just because you don't want to be alone. Please don't let yourself be used or hurt or treated as if you owe him just because he puts up with you. You deserve more than that. We all do.