Hey, my first child was born 17 days over, i didnt even discover i was pg til 28w (just had a pot belly) he was 9p 2oz (4.15kg) at birth; my second was delivered at 37w, he was already 8p (3.62kg), and my 3rd, a girl, was born at 30w, she was 3p 11oz (1.68kg), but on the 97th percentile (going by that, she would've been 9-10lb at birth...) Im very slim, and about 175cm tall, and inever looked as pg as i was, just the way i carried them (posterior, spine on spine) Everyone carry's their bubba's different, sometimes it can be because of a bigger bub, or excess fluid, but it may just be the way your carrying bub. Hope its nothing to worry about