Hi there

I had very similar circumstances to you and also had 2 scans done before my 12 week scan - the 12 week scan was done to eliminate Downs Syndrome and from what I've read you only have a 2 week window where they can take the measurements they need- from week 11 to week 13.

I think the scan is worth it and besides you get to see the bub again which for me has always been very reassuring - good luck either way O

dianna