What are the chances

Me
So, this month during my fertile week, (which supposibly ends today)  my fiancé and I literally only had sex on my actual ovulation day,  today is two days after, and I have hardly any lh surge, but I'm still gonna get him to bd, we were going to lnight, but he was real Ill yday :( have any of you got pregnant, by only bd I your ovulation day?? 
Thanks in advance xxx