Yes. During pregnancy your body releases relaxin a hormone to loosen you joints and ligaments particularly in your pelvis to prepare for labor. Not to mention all the everything the baby takes out of your body like calcium. Both pregnancies I had issues with ligaments in my arms and neck moving out of place and snapping back it's really painful. As above ask your DE if there's anything you should do and be careful it's easier to injure yourself right now.
Yes, I would up your calcium intake and let your doc know, joint weakening can happen but there are ways to help it