Went for my 12 week scan today (thinking I was around 11.5 - 12.5 weeks) but the scan showed I was only 5 weeks and the embryo measured only 2.9mm. I have to go back again in 10 days to see if it has grown - however there is no way I can only be 5 weeks as I did at test 5 weeks ago which said I was 3+ wks.
I'm suspecting this is a MMC - wondering if anyone has experienced anything similar?