Hi I'm Worried About Something That I'd Like A Doctor's

Hi I'm worried about something that I'd like a doctor's opinion on. About 2 weeks ago my boy friend and I had sex, it was deep and kinda rough but nothing out of normal for us. and towards the end I started having severe sharp abdominal pain. It felt like everything ceased and tensed up. It took about 10 mins before the pain eased enough for me to stand up. That had never happened before. Then a little later that night I started bleeding, I thought he had just jumpstarted my menstrual cycle and gave me my period which has happened before. But it's been 2 weeks now and I'm still bleeding and more heavily then I ever have before. It has me worried and I need a doctor's opinion.