daphne,
my edd also never change since day 1. still 4th aug. but gynae told me that i can expect bb to pop ard 10 days earlier.
for my gynae, every visit, he will ensure that my bb heart lungs, liver bladder and all limbs and other parts of are doing well.
last friday, he teach me to count my bb heartbeat. maybe you can do so also. he told me to monitor bb's kick from 12noon to 12am, must have at least 20 kicks, light or strong so long there is movements, its consider 1 kick.
as for the bb head, gyane told me that she is at the correct position with head down leow but not engaged. he said that there is still chance that the bb head will turn up, but by week 32, the head must go down, otherwise, afraid that there is not enuf space for the bb to turn down then chance of natural birth will be slim.