Sugarpie,
I had my first scan at 12 weeks and I still got the same as you. It seemed everyone else was getting scans at 8 weeks or earlier. It made me feel bad and to be honest insecure that I hadn't had an earlier scan yet. But I also felt that I really wanted to wait for the 12 week scan. I was looking forward to the 12 week scan though simply because I felt so great I wanted to make sure there really was a baby in there and when I saw it moving around like a gymnist I couldn't believe it was so active and I couldn't feel a thing. So it actually gave me confidence that just because I couldn't feel it doesn't mean that its going ok in there.
I am 31 and DH is 35 and to be honest we really didn't need to do the NT scan. But I just did it for piece of mind more than anything and it was an excuse to see the baby. Now I cant wait till our 18 week scan, I sort of know what I am in for and can be mentally prepared and of course try and train my bladder to hold more fluid for longer (how mean is that!)
Each to their own and the most important thing for you and your baby right now is that you trust your own instinct and DONT for a second, second guess yourself!
Good luck... your going to love it! I hope you get a dvd to watch at home over and over again!