Maz, thank god for technology thats all I can say.

With my DD I wasnt 100% on my dates, but I did have a fair idea when my LMP etc was, so I figured I would be due Sept 20. However the dating scan came up 6 Oct as my due date. I knew deep down this was wrong, I knew that date wasnt possible. However I went with the flow. A scan further down the track picked up that yes my edd was more around 22 Sept, however for some reason my doc still wanted to run with 6 Oct. I was so worried about this knowing that placentas wear out, so I changed doctors at 30 weeks & she went by 22 Sept & told my hospital to change all my dates. DD was born 5 days late & she was a porky bess. So I knew then that I was right on my dates. I know its not a huge diff between 22nd Sept & 6th Oct but it could have just been enough iykwim? Go with your instinct ladies.