Confussed ???

Maybe its the baby brains or I'm just not getting it :wall:
When I first found I was expecting, using the due date calc and the doc did this too, my due date was 03 May 2012
I went and had my first scan, which I believe is the dating scan aswell and according to both, my due date is established as
28 April 2012.
I just got off the phone with the Ultrasound place, to book my 2nd scan which I believe is done around 19-20 weeks
So the receptionist on the phone booked me in on 01/12/2011 (next week) which acording the calender I will be only 18 weeks. I said this to the receptionist
and she said i will be 20 weeks:doh:
So I'm a bit confussed, but regardless will this effect the scan at all?
Should I call back and confirm? Or will this be ok?
Any thoughts would be great :D

The Morph scan is generally known as the 20 week scan, maybe this is what she meant:dunno:. It will still be fine to have the scan at 18 wks. I had both mine at 18wks and everyhing went fine.

If you click on pregnancy ticker up the top and then go to the calculater it can work out edd and how far along you are.