K.W.
My children do not have Down's however both of my AFP tests came back positive that they both could have it. I followed up with the amnio's to prepare myself in case they did (you know, get a knowledge jumpstart on how life would be). If she is basing her fears off of that test, know it has a HIGH percentage of false positives. I would recomend reading up a little on children with Down's and wait to hear about confirmation. If she's not talking about it, it is because it is a very private and personal issue. One that a lot of people struggle with, options, are there options, what will I do, etc.
Let her come to you, it's hard on the family to let her have her space, but that is what she needs right now. She'll talk about it when she's ready.
-K.