Every pregnancy symptoms will be different not the same for all mummies. As long as you are eating well, taking pre natal vitamins you are good. Also, have materna milk to boost more nutrients and vitamins to you and baby. Not everyone will have a big baby bump. It depend on baby, your body genes. Need not worry unless you are being told by doctor to boost more weight for baby or baby is below a certain percentile during the pregnancy check.
FH