We had a measurement of 3.7 for the nuchal thickness on Tuesday, so we have to go back tomorrow for a more detailed scan and probably CVS or amnio test. It is an incredibly worrying time, but keep in mind that most people who go through this have perfectly healthy babies. And I've heard that if you've seen the nasal bone, that decreases the risk of Down's syndrome.
Hope your results come back ok tomorrow. Sending you positive thoughts! Xx