me too, yesterday just went scanning, should be 30w, but my fetus stomach is around 28w+, I'm also a bit worried. I already try to eat more, but not sure why still cannot catch up. maybe should try drink the maternity milk also. hopefully next scan will turn better, but I think sudden changes also not good, as long as baby is growing should be fine. My gynae only said my baby will not be a chubby one.
Lany