I am just opposite to yours, I am 見肚 very early.
wk 8,9 already have big 肚 "nam" , then
wk 11 , i cannot wear my normal jean and had to wear 大肚 dress. so, all my colleague knows I am preg. on wk 11.
i am now wk18, but my 肚 already look like 7 months la.
bb size normal and i had only put on 7-8 lbs. <-- normal ar...... just don't knwo why my 肚 so big..!!