I've just had exactly same result last week. I'm 25 and due to my HCG level being high my NT test came back as 1:250.. however I haven't actually had any morning sickness so it was a bit strange that my HCG is high. Originally when I was told these results I was thinking I would definitely do the amnio but now i'm thinking I might speak to my obgyn about doing a maternal serum screening at around week 16 instead to see if my risk has gone down.. the thing is if it does have DS we can't afford to raise it so the results are very important for us.. i guess i'll see what the ob says this week..