Haha well I think you ovulated Wednesday. Haha. ( refer back to my post if you wanna know why)
But no matter, because sperm can live n there a couple of days. So sun mon tues is good! Sperm swimming around nonchalantly ( just as all men are nonchalant about.. Everything!) then the egg pops out on Wednesday and says " well hello there big guy" and bam.
this could definitely happen.
Any given cycle there's like a 30% or something percent chance, because cell division has to happen correctly, the egg has to implant and connect to uterus correctly, and then things have to start to grow correctly. If there's any tiny glitch in these steps, then it just doesn't proceed and you get AF.
So I'm thinking your timing was fine, and lets hope for the best. It's in gods hands whether this baby is meant to be at this time.....
Try to go with the flow and I'm hoping in a week you will have good news