Starting late....

So my pharmacy goofed and didn't fill my prescription for my birth control until the day after I was suppose to start a new month. (It's an automatic prescription)

The day I was suppose to start it, my fiancé and I had a little fun and did not use any precautions..

A little miracle wouldnt be a bad thing, after the mental freak out that is lol.

What do ya think my chances could be?