Ligament pain

Car
I'm a pretty petite person, 5'1, 38 weeks pregnant and weighing in at 147, I've only gained about 18 pounds. That being said, my skin feels like it's being pulled so tightly that it's uncomfortable. Ive tried every type of lotion, from cocoa butter, coconut oil, creams, to Aquaphor. Last night I went to flip over and it felt like a ligament in my stomach snapped. My skin near my ribs/stomach feels raw. Has anyone else had this happen or this pain? Any suggestions?