So I had sex on 2/7 twice (once in the morning and once at night) with a negative opk. Another negative opk on 2/8. Then a positive opk on 2/9 @ 8:30pm. Didn't sex night of 2/9. Hoping to sex tonight 2/10. Lol. Are the swimmers from 2/7 good enough to cover 2/9? Does this make any sense? Lol sorry I'm new to this.