Totally normal, sperm can live 5 days but need time to mature (capacitation) And the egg only lives for 12 hours (24 hours if you really push it). And you get the good cervical mucus BEFORE ovulation, not the day of or after. DD1 was conceived by BD'ing 3-4 days before O; DD2 was 1-2 days before. When we started ttc, we would put too much emphasis on O day, and never got a bfp.