Stomach soreness when laying on it

Stephanie

This past week, I kept waking up in the middle of the night, to adjust myself and my stomach would be SO sore from laying on it. Even if I'm sleeping on my side, if I roll a little bit on my stomach and sleep like that, I wake up to soreness! It goes away after a few seconds, but it's starting to wake me up at night. It feels like my muscles or ligaments are being pulled or stretched. Anyone else going through this? Is this normal? I'm 20 weeks.