Eh, totally normal la! Especially kalau first pregnancy or body shape you macam tu, skin elasticity dan positioning baby semua boleh affect how your belly looks bila baring vs standing, memang akan nampak different. A few of my mum friends had the same thing, one of them the folds were so obvious her nurse pun question jugak, but delivery time semua fine je. Since baby healthy and growing well (which is the important part!), I wouldn't worry sangat, tapi kalau you rasa any weird sensations or anything else feels off, just mention to your doctor next check-up, okay?