Could I possibly be pregnant?

I have been having unprotected sex with my partner for some time now and for the last two times this week, it had been painful to my female region. i have NEVER experienced this pain before, but i wanted to know if i could be pregnant. ive been told that in some cases sex is painful in early stages. My breast have been tender for about two weeks(not worst than regular menstral tenderness) now and im due for my period at the end of the week. i have noticed that i frequently have to urine too, bt i drink a lot of liquids. I have not experienced any other pregnacy symptoms though. can someone help??