It's been almost 8 years since I have had sex. I now have a partner and we had unprotected sex for the first time 3.5 weeks ago. He stayed inside me for a few minutes and when he pulled is when we noticed a pool of blood. I bled a lot, (which I figured it was from the vigorous sex, but then about a 1.5 weeks after, my breasts are tender and heavy feeling, I am tired but I attributed that to my low iron. I had lower abdominal cycle type cramping, very minor. I am not due to have my cycle until the 15th and it's the 4th, I am regular. Could the bleeding have interrupted my cycle? I haven't gotten it yet, just curious. I was also wondering that if I bled like that, is it possible none of the sperm actually made it in?