"so the first day of my last period was oct. 13 2016.i had unprotected sex 13 days later in the morning of oct26. i took plan b oct27 just less than 26 hours later.i started getting cramps nov.4,5,6. nov7 i had fresh blood in my underwear so i put a tampon in thinking it&#039;s my period. there wasn&#039;t really much blood on the tampon so i put a liner on and didn&#039;t bleed again til nov.9(which was my expected period day). because i never had a period so light i was online and read about implantation bleeding. i was freaked out so i took a pregnancy test today nov. 10 and i&#039;m pregnant. i don&#039;t know what to do i&#039;m still spotting but it&#039;s brown now. i think it didn&#039;t work for me because i was ovulating and i must have release an egg in those 26 hrs"