Your HCG levels are really good, so maybe it is just a little early. I have long cycles and when I had my dating scan with Lindsay, they put the date back one week, meaning I was only 6 wks instead of 7, which meant I actually conceived a bit later than I thought. This could have happened to you Snod. And it is not uncommon for sperm to live for up to 5 days anyway.

I'm sure your next scan will be fine.