i am 21 years old.i had sex with my boy friend last month.this is the first time i had sex and i dont have any knowledge about having sex.i was not likely to do sex with him because i wanted to be a virgin until our marriage but i had to do sex because of my boy friend's force.while doing sex i didnt even stretch my legs too wide.i didnt even understand whether his stick went into my vagina n tore my virginity layer or not.we just had sex for 5 to 10 minutes.after dat i had slight pain in my vagina are for nearly half an hour or so and then i was totally normal.after a few days i got urinary infection.is this infection due to having sex or is it normal?i got my periods also as usual for 32 days.now my question is i dont know whether we had sex properly and whether i lost my virginity or not.now i wanna know whether i am still a virgin or not.how can i know