I'm due October 30th, as well. I had mine Monday but the baby wouldn't get in the correct position so I have to go back May 1st. It's great though. He/she had a strong, fast heart beat of 172 bpm. And was a hyper little thing. I was worried at first with the heart beat being so high but was told it was perfectly normal since I was only 11 weeks, 4 days. Don't be worried! I'm a first time mom and I was told that there's a very slim chance as long as it's not in either yours or the daddy's family! Good luck. :)
Idk what a nucal test is.