Has anyone got a BFP when...

Miss
Has anyone gotten pregnant when you did the BD around ovulation but not on your actual peak days?  I'm just curious as I know the swimmers can live for a couple days and my hubby is out of town for work on my 2 peak days... We did the dance before he left and will when he gets home but just wondering if anyone has some encouragement for a similar situation ;) 
I mean, how common is it that the swimmers actually live that long lol
Thanks!!