Opk and pregnancy

Emily
Hi ladies! For those of you who have been tracking your ovulation, have any of you gotten pregnant by having sex on the days where you did NOT get your LH surge? My surge is today, and tho I have been BDing every time a got a "pretty dark line", today it's darker than the test line but not sure the hubby and I will be able to link up to BD:/ any help would be appreciated:) thanks ladies!