Stomach sore after waking up

For the past two days I've been waking up and my stomach is sore. I think the first night I may have slept too much in my stomach so my body was telling me to switch positions. Any way I woke up and my stomach was kind of unhappy with me. This morning again I wake up and it's kind of sore feeling. I'm 22 weeks. Any one else wake up feeling kind of sore?