I was really nervous about my 12 week scan but got over myself and all was fine but where I thought the most controversial thing I would find out at the 20 week scan was the sex of the baby I now realise that there are a multitude of things that can be wrong. Am finding it hard to concentrate on my work for worry as I can't feel the baby moving yet (am exactly 20 weeks). Sorry - am a worrier by nature but this is my first and I'm not sure how it's meant to feel. Any advice?