D.W.
It is completely possible. Not all women ovulate at exactly the same time. We discussed this in a few different classes in college (Biology major). The "normal" ovulation cycle is just an average of what most women experience.
Congratulations if you are pregnant and were hoping to be.
Your human chorionic gonadotropin (HCG) levels will be detectable within a few days after conception for detection on a pregnancy test. You should know any day.