i'm 17 years old and i had unprotected sex on the 21st of this month. he did cum inside me. I'm not sure if i was ovulating because i read that you ovulate 2 weeks before your period and i start my period around 5 or 10 of every month. My breast were sore before i had sex, but now they are more sore each day. also my back hurts alot. i dont know if its because im ovulating? i know its to soon still to know if im pregnant. But what are my chances of being pregnant? cause i heard how it sometimes takes a lot of people a long time to get pregnant.