The first tweleve weeks can be filled with exhaustion, morning sickness, worry etc. Deb we did the same thing as you - looked at our scan photo's constantly:) I have a 3D scan photo that I will post on the photobucket site so you can see what to expect as your twins develop.
www.photobucket.com
I will confirm when I have uploaded them for you to view - sometime today.
Our twins in the early stages were about 5 days different in growth but they caught up by the 12th week and now are almost the same size. I remember being really worried about that.Their heartbeats at 19wks 4 days were 154 and 151.
Kimberly - one thing about housework - it will alwyas be there for you. Take the time to rest - you will feel better in the weeks to come

Take care girls and yes it is one step at a time.
Cheers
Di