Hard to be accurate: A pregnancy test will usually turn positive somewhere around 4 weeks (2 weeks after conception). So you probably weren't 4 weeks on 8/7, but became 4 weeks sometime between 8/7 and 8/16. So you're likely around 4-5 weeks. An ultrasound at 6+ weeks will give you a better idea.
Answered 8/17/2014
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3 doctors weighed in across 2 answers
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