S&S can you head to the hospital sooner rather then later? The CTG they do to monitor bubs heart rate might help put your mind at ease. If bub was distressed it would very well show on the CTG without the scan and they could do something about it soon rather then after your scan. There is every chance bub is just been quiet but better to get some piece of mind rather then worrying about it as much as you are. Its such a scary time. Thinking of you and hope he/she starts kicking up a storm inside.