I am sorry that you have to go through this wana!! I know its easy for me to say but I did go through this, and you should do like the nurse said and not worry.. Soooo many times they have false positive like 90% of the time.. so its huge!!! Its not a diagnosis its a screening.. 1/165 is soooo low!! don't worry!! chances of your baby having down syndrome is soo slim!!! Please don't worry, it'll be fine!!