I know a lot of woman who have this same problem. Have you tried lubrications? Or anything like that?
I have a suggestion that might help you out a bit... One of my girlfriends told me that she believes the pain might come from not being "turned on" enough, so she uses a clitoris vibrator and stimulates herself a bit before penetration, with lubrication and such. She says that it has helped so much! Also trying different positions can help a well. When I first started having sex, I too felt a little discomfort, and I talked with my partner a bit about having more 4play before, to help things go easier. These have helped a lot for us. Also, my advice is to just talk to your partner about the situation and maybe try new exciting things as well. I hope this helped...Good luck!!

I found out that I was allergic to latex from having sex w/ a latex condem...Maybe that is your problem. Once I started using lamb skin, everything was 100% better.

You may also want to ask your doctor to see if your uterus is too low. That can also cause the pain you are having. Do some research online for symtoms of a low uterus and see if they match the symtoms you are having.