I had my 20 wk scan this week and the sonographer said everything looks fine but the baby was too small at 19 weeks to see the heart and spine properly so I have to go back in 2 weeks to have another look. Initially I thought fine I'm still only 19 weeks but now I'm freaking out a little and should have asked whether he is measuring ok for 19 weeks or where she meant that he was measuring too small....