i know exactly how you feel! i too am 17 weeks and third pregnancy and living in the QLD heat. i have to keep un-doing the button on my shorts whenever i sit down... my husband laughs at me so much. i have the belly belt from last time but the smallest extension is actually too big at the moment! luckily i have one bigger pair of shorts which are doing alright at the moment... i haven't seen anywhere that have good maternity shorts either? any ideas?