I good family friend was in a similar situation, it was her 3rd child, she was only 27 and came back with a high risk after the nuechal fold test. (Sorry I don't know which bit put her in the high category) Anyway she and her husband mad the decision not to have the amnio and she went through the pregnancy not knowing. (Very strong of her I don't think I could have done that) long story short she had a beautiful healthy little boy who was perfect in everyway.

I too think that they shouldn't have booked you an amnio without discussing it with you first.

I'm sure everything is fine too.