Hello girls!!! Second pregnancy and I already have a huge belly? And …

Hello girls!!! Second pregnancy and I already have a huge belly? And in my first pregnancy too, I had a huge belly. Everyone asked if I was having twins. Then on ultrasound they put a lot of water (kazakh type su egiiz). I thought that on the second one everything would be fine but today I noticed that the belly is growing fast. What should I do? Aaa? I want a normal belly. And so I have stretch marks after the first one.