Hi, My period dates are usually 16th or 17th of the month. bleeding begins on either of these two days. I had sex with my friend on the 15th and after it, the condom slipped off, keeping it in my vagina filled with ejaculatory fluid. Obviously we were tensed, so I took an oral pill Ipill in 2 hours. It has been over two weeks, I still havent got my period for that month. I did a pregnancy test but it showed negative. I had taken the evening samples, thinking it would be fine. Why isn t my periods coming? please help!