Round Ligament Pains when Resting?

Hello! I'll be 24 weeks pregnant tomorrow. For the past two days I've been getting sharp twinges on both sides of my uterus area, where I would guess ligament pain would occur. However, it seems to occur when I'm just sitting down and not even moving. Is that common? I thought you were supposed to notice it more when you quickly moved or coughed or something like that. Has anyone else experienced round ligament pain when resting? Thanks!!!