Only the “SAC” is visible

yea. same with me. i was 7w but only sac was visible and the size was 6w. then in 9w baby was visible with heartbeat but still 1week smaller. register buku pink at 13w and doctor asked to revised edd bcs of baby size. i am 24w now, and yes baby is 1week smaller than lmp. and my edd is postponed 1week after the original edd.