Just went for a dating scan. They could only see the sac, nothing inside.
Dates of ovulation and DTD make it 10 weeks.
There's a tiny theoretical possiblity that it could be 7 weeks, if I had an incredibly late ovulation date with no EWCM/pain (I always get EWCM and pain), then a positive pregnancy test straight after conception.
But they'd probably have seen something, if no heartbeat, if it were 7 weeks, correct?
So probably a MMC. Waiting for results from the scan - which, here, take 2 weeks 