T.B.
Don't worry! They did the same thing to me when I was pregnant with my daughter 11 years ago and she is perfect. And I agreed with you then and now, If I had to deal with something like that, Downs is one of the less invasive ones. My advice, again, is don't worry. Ask the OB what the stats are, because if I remember right(it was 11 years ago) the chances were pretty low and there were a lot of false positive results from that blood test.