I had unprotected sex about 5 weeks ago and am concerned as to why i havent gotten my period. First off he didnt finish, second i took plan b within 20 hours of having sex and ive taken 2 pregnancy tests. I took the first one one week after taking plan b and i took the second one 5 weeks after taking plan b (my first missed period). Both results came back negative, but i have yet to get my period. My period is normally somewhat inconsistent however im not sure whether or not this time it have something to do with sex.