Thanks for writing in.
This is good to know that otherwise your scan was normal & you don,t have any positive family history. Your baby's nuchal fold thickness is slightly above normal & this is considered to be a marker for chromosomal abnormalities including Down Syndrome. How much is your chance to have a Down baby depends on many other factors like results of your first trimester screening & serum screening ( if you had any ) as well as on the expertise of the sonologist doing the scan.
This certainly does not mean that your baby has Down syndrome but you need further counseling & may be some invasive tests like amniocentesis
to get full picture.
So, follow your midwife & see a specialist for full counseling & advise.
Best of luck.