Okay so my period is 9 days late today and I was supposed to start on 1/13/17 and my LMP was 12/16/16. I'm on CD 10 as of day and I had unprotected sex on CD 18 & 22. My bf pulls out when we have unprotected sex, but one of those days I felt like a warm sensation in my vagina when we both finished (was wondering if someone could elaborate on that for me). I've taken a pregnancy test and it came up negative. I'm also taking the pill. Please help.