Ok so my period was on the 31 of may. i had put on a birth control patch on the 6th of june i took the patch off out of annoyance on june 9th. of course this made me start a second period. is it possible to ovulate twice in one month? because soon after that second period caused by the birth control ended, i had sex with my boyfriend on the 17 and now on the 21 i am feeling a bit sick. could i be pregnant?