Ay, mahirap sabihin talaga based lang sa timing, mama! Based sa last period mo (Dec 3-6), ang fertile window mo ay usually around mid-December, kaya possible na buntis ka na lalo na kung delayed ka na ng 3 days, but honestly, the best way to know for sure is to take a pregnancy test na, lalo na ngayong delayed ka na. A few of us tried doing the math din based sa LMP, pero ang test talaga ang reliable, especially pag delayed ka na ng few days, the hCG levels would be high enough na to show up na sa test!