i didnt feel strong DEFINITE BABY movements until after 20 weeks, maybe even after 22 weeks. I wouldn't worry, its different for everyone... soon you will start to feel them and then you will notice them at certain times throughout the day....

I worried too, and it wasn't necessary, so try not to worry too much. When you have your next scan I am sure you will be relieved. Scans seem to be so reassuring.