20 weeks with my second, i did carry big with DS although he was only 6 1b 13oz! Put on 3 stone in total (was 8 stone to start, was 9 stone to start this time) This time i'm huge, seriously big. I have put on a stone which is average to last time but i look heavily pregnant. Have scan on monday but i'm worrying myself sick that something is wrong. 
Someone tell me to get a grip and stop panicking. Mum mum was small framed to start with (8 stone) and put on 4 stone with my brother and I so maybe its just the way we carry. I'm not over eating in my opinion.
Need some reassurance!