How to help relieve sore/tender uterus during pregnancy?

I’m 19 weeks along and the past week I’ve noticed a very tender uterus. I assume this is caused from it growing. Possibly because the baby kicking and moving around so much (which he seems to be doing a lot of lately). Whatever the cause, is there anything I can do to get relief? Just to get off the couch is difficult. Moving too quick, coughing, etc is painful. Any advice?