My son's measurement was not as high as yours is but it is a happy ending story so I thought I'd post anyway. His was 4.2mm. The amnio showed no abnormalities & sure enough when he was born he just had a kind of fat fold of skin at the back of his neck.

The wait for the results is really horrendous. Make sure you keep yourself busy with things that require brain work. If you are working then put your mind in to your job. If not working (or when not at work) do crossword puzzles, read books anything at all to keep your brain away from thinking about the possibilities.

I wish you all the best with the CVS & hope that the waiting time for the results goes by speedily.