OK. Generally speaking, you can't really find out you're pregnant until you miss your period. (yeah, there are a few EPTs that tell you before that, but unless you're actively trying, who wastes their money on those?)
Assuming a person has a swiss watch perfect 28 day cycle and a pregnancy is measured from the first day of the last menstrual cycle, the earliest the average person would find out they were pregnant is at exactly 4 weeks gestational age.
Father's day was on 6.15.2014 this year. Erin disappeared on 6.28.2014. Reports have said she confirmed she was pregnant on Father's Day. Doing the math, the MINIMUM amount of time she could have been pregnant, assuming the above criteria are true is 5 weeks and 6 days.
That's the cold hard math. So 3 weeks is out. Even with the 5 days before your missed period test, she would still be 5 weeks and 1 day.
Now, as I recall, the reports say that Father's Day is when the pregnancy was "confirmed" which is an interesting turn of phrase. That implies that it was suspected BEFORE that date.
Now, I realize that some people know they're pregnant before they miss their period. I've known people were pregnant before the pregnant person has known. (Really, of all the superpowers I could have, I got pregnancy detection, being able to guess lottery numbers would be WAY more useful.) But assuming that EC was not using an EPT every month before she was even late and assuming she was 28 days swiss watch, she had to have been at least 6 weeks along when she vanished.
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