Had unprotected sex Nov17 7am.. Got my period later that day 10:30pm & it usually last 3days ending on the 4th day but this time it ending 3days & it was a little lighter than usual.. It's now dec6 & my breast are getting more sore each day, I'm sleepy all the time, I urinate more often, feel slight cramps & a little bit nauseous, could I be pregnant even though I had sex & got my period the same day? Or is it all in my mind?.