Preg with second child (Haven't lost postpartum weight)

Has anyone being preg and did not lost postpartum weight? It been 2 years since I delivered. But I have not lost my postpartum weight. I used to be 37kg, after delivery become 55kg. I'm 7 weeks pregnant but my stomach is so big that it feels like 4 mths preg. Will it be too tough when I'm full term? I'm a petite size mum.