I'm so sorry you have had this news in your pregnancy. It may help you decide what to do if you speak to a genetics counsellor who could give you your new statistical risk or having a child with downs syndrome, so you can compare it with the risk of having an amnio. It's not an easy decision no matter what you decide but talking through it with someone trained in these issues might help you make up your mind.

There are others on here who have been in your shoes so hopefully one of them can come on and be more help to you that I