So me and my bf have been dating for three period was dec 20-25 unprotected sex afterwards but he pulled out and i took a pregnancy test when i was 11 days late and it was negative..we had sex again feb 4 and afterwards we decided for me to take plan b. Well not even a hour later. (Feb 4 )of taking plan b i started i dont know if this is my period coming after not having one or miscarriage or just the pill