Girls, what do we do with gas? How can we help the baby? They're const…

Girls, what do we do with gas? How can we help the baby? They're constantly hurting all day and night, I spent all night last night rubbing her tummy so she could sleep, then she spent another half of the night on my chest. And then it will be like that all day long. I even put a heating pad on, rub her tummy, and raise her legs towards her belly, the pediatrician prescribed Eспумизан, but it doesn't help. She's always crying and crying, but she can't poop. She only pooped twice yesterday morning and hasn't pooped since, just gas. Are there any other remedies?