Rib cage pain?

Hi hi! I’m 21 weeks tomorrow and about a week ago started experiencing what I can best describe as a runners pinch/cramp you might get in your side, but in my rib. It doesn’t last very long and usually wiggling around and stretching can help. It’s become more frequent and happens mostly right side. However, tonight it’s lasted quite awhile and traveled to also my left rib. No abdominal pain but just in and out of this continuous rib cramping. It’s usually upper rib and can even feel sore to the touch. It isn’t horrible pain but it’s more so the waves it keeps coming and going in. When usually it’s a pull and a cramp and done with! I ASSUME it’s round ligament pain and little lady growing! Has anyone else experienced rib pain?