Ah Gweny - that sounds so very much better. I'm sure everything is going to be fine. It's nice that you'll get the reassurance tomorrow. How stressful.
I opted out of the first tri screening for this very reason. The statistics regarding the results for women over 35 were terrible in terms of accuracy. I know myself and I cannot have that kind of stress for another six months. After this test, my sister-in-law refused an amnio because of the risks and the genetic counselor told them that their twins were both downs. Neither baby has downs syndrome and they are about to celebrate their first birthday and are completely healthy! On the other hand, my best friend had all of these tests and went to a genetic counselor who told her everything was perfect. Her second son was born with downs syndrome. While the tests are providing a rating, I can't see trusting an ultrasound that can't even predict the sex 100% of the time. The tests point to risk and not truth.
OK, off my soap box! Can't wait to hear about it tomorrow Gweny and I hope you get the peace of mind you need to be stress free for your little one!