My vagina feels sore after a few days after my first day of having sex what could be wrong?

Ok I had sex for the first time 7 days ago (we used protection) afterwards there was NO pain, and even after I peed no, type of stingy like my friends said here would be. But of course um sure after every girls first time they wonder if their pregnant or not. But luckily there hasnt been any signs visiblE besides some times my stomach would hurt, but it feels like my cycle would be coming on which is hasn't yet, I'm patiently waitin 4 my cycle which should be on now, but isn't , by yet my stomach hurts sometimes, nd it goes away today I notice that my vagina felt sore when I was using the restroom and when I peed it felt really warm bt not really a stingy feelin and idk what it is and I'm kinda gettn nervous any suggestions? Tips? I hope I don't have to take this up 2 the doctor :/ -Tiffanie.W