I was nervous before mine as well (I'm an anxious worrier)-I will be thinking of you and just think-this scan is so much fun because you can see them moving and doing all sorts of wonderful things!
Don't worry though if baby won't cooperate with their measurements and ask to you come back-this happened with Eleanor. At the first scan she was sleeping with her back to us and wouldn't wake up-so we had to go back a few weeks later and then she was totally jumping around, etc.
Make sure you drink a juice or something sugary before you go in so baby is bumping.
no, all of my blood screening and genetic tests have come back good but I think the unknown just makes me nervous
oh, good!
then just try to relax and enjoy seeing your little one tomorrow. just a couple of days ago i was looking at my 21 week u/s pics of e...he looks a lot like his pictures from then. its a crazy experience!