Well, there are lots of things that can be causing the pain. However, what you need to do is investigate the pain. Is it entry pain or deep pain? This can make a difference and it will help your doctor with the diagnosis.
Another thing is that you will probably need to go and see your doctor if you experience pain during sex. Majority of causes are things that cannot be taken care of without a proper medical treatment. And you need to realize that.
Do not force yourself into having sex
Also, do not force yourself into having sex if you are in pain. It will not make things better, only worse. The first thing you should do is visit your doctor so that the problem does not get bigger and bigger. And, you should also inform your partner so that he can help you. Without telling him it will be a lot harder and it might even ruin your relationship. Do not let that happen. Painful sex is something you need to get rid of.
You deserve to have a great sex life
Remember, you deserve to have a great sex life and enjoy sex again like Debby! Pain is definitely not part of it. Is it? Just make sure that ou do everything you can in order to get rid of it.