Ah, that makes more sense, calendar-wise.
Dunno. There've been some women who didn't know they were pregnant 'til they went into labor.
Anyway, why not just do a home pregnancy test or call a doctor and find out for sure?
And, I still can't figure out the dates here. If she didn't have her period by July 4th, well, it's July 19th, like I said. What's happened in the past 2 weeks? Did she get her period or not? Seems like the answer to that question would be Job One, and if the answer is that she still hasn't gotten her period, Job Two is a home pregnancy test and Job Three a trip to the doctor's.