Eh, there's a lot of different stories in this one. I don't know who's answering and who's asking questions. If you have something similar, please start a new topic so I know where to find your question!
Pain during sex can be caused by a number of different things. Mena, I agree with pink highlighter, it really sounds like your guy bumped your cervix. Sometimes certain positions or angles aren't going to feel good and can be extremely painful. Remember what hurts and avoid these positions. Although, going to the bathroom before and after sex is also a very good idea too.
As for the other ladies, if you do not use enough lube then sex will be a little painful until the irritation or tears heal. So you'll need to stop having sex for awhile so they can heal. It's also possible that you have an infection, in which case you'd probably be experiencing or symptoms as well.
If sex is still painful then it would probably be a good idea to discuss it with a doctor.