Your risk is very low. you DID get a great number! My # is 1:100 with each baby I have and I"m only 23. my first son has down syndrome (he was born when I was 21)
your risk is LESS than %0.5. If you are going to keep your baby no matter what then I don't think you should get the amnio. Get a level 2 ultrasound where they can check for many soft markers.
I had amnios with both my baby boys due to a skin disorder that I have that can be inherited. it's a %50 for each child and I was checking because babies born with EHK can die of infections and I wanted to know if I should get a csection or not (to help not expose him to bacteria)
there's a %25 mortality rate for babies with my skin disorder.
We found out first that he had down syndrome, then we found out he had EHK, and the day he was born we found out that he had 3 holes in his heart and would need open heart surgery in the future.
But I'd do it all over again to get my little man!
Feel free to message me with any questions or if you want to talk. I"m very open and give honest answers. I don't judge and nothing is too personal for me.
here's a link to my journal about testing for down syndrome:
http://www.medhelp.org/user_journals/show/89768/FOR-NEW-PARENTS-Down-Syndrome-Causes-Treatments?personal_page_id=863671
TTYL
Cindie