We were given a 1 in 57 chance of having a baby with Down Syndrome at our 19 week scan. At that point we declined the amnio as we would have continued with the pregnancy regardless. We were given extra monitoring and more frequent scans. A health issue at 28 weeks meant we ended up having the amnio and the FISH results showed that there was an extra chromosome and the full karaotype the week after confirmed that our DD had Down Syndrome.
If you able to, I would opt for the FISH results as they come back within 48 hours although I think they are not as reliable as the full results but it will give you an indication.

Go easy on yourself and let yourself feel how you want to feel. There is no right way or wrong way to deal with this.

And remember that you may be the one or you may be the other 23.

Our DD is now 4 weeks old and is beautiful and perfect and very much loved. Regardless of that extra chromosome.