I've never had sex before. Recently, my boyfriend and I were humping, but that's about it. But he is not very sure if it was only humping or if he actually was inside me. I am not so sure either as I have never done it before. All I know is that after we were done, I had a lot of pain down there and was finding it kind of difficult to walk, but it went away the next morning. How will I know if we actually had sex or not?