old blood and pain?

So, I've been on birth control for years. My period started last week on September 29th, and about 4 days ago I started having old blood and pain at the opening of my vagina that is on and off. I do have a friend with benefit but we've agreed to only have sex with each other. I know the second to last recent time we had sex when he pulled out he hit the wall of my vagina pretty hard which hurt the both of us and then the last time we had sex, it hurt when we were having sex. So I'm wondering if this ever happened to anyone else or if this sounds like anything bad? I went to the gynocologist today and she said she didn't see anything wrong, just old blood and when she did a pap smear test and checked my ovaries it hurt. I couldn't sit still. She also drew my blood. Any info or opinions help. Thank you guys!