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You conceived around July 21 if you are really 5 weeks. Any future scans are less accurate. A first trimester scan is accurate to within 5 days. If you really conceived in June then this is a miscarriage because you would be much further along. I'm sorry.
No. You conceived july 21. I'm sure the 9 week scan will confirm it. A 5 week sac is plus or minus 3 days