Hi Beehen, before starting to freak out rather go to the specialist first - a lot of the doctors nowadays are overly cautious when it comes to anomalies and everything is about percentages rather than something being either a yes or a no.
That being said, I am sure you are going out of your mind, but I also have a friend that needs to go for a specialist test for down's at the end of the month and the wait is killing her... Not sure about your age, but as one gets older, a certain percentage risk that would have been fine if you were 22, now suddenly carries a huge risk at 30...
You are in my thoughts