You know, if you do have the world's biggest baby you'll probably make a fortune! Sorry hun, I don't want to make light of your situation, but my faith in sizing scans is pretty much on a par with the other posters. I think if you do a search on baby size you will find a number of posts where members have been terrified after being told they were having big babies - some even organising c/s as a result - only to have very average size babies.

And I also agree - what does size really matter anyway - you know you can birth this baby vaginally so the size is really neither here nor there.