Odd symptoms popped up overnight

I’m 29+5 and I woke up this morning and my legs/hips were so sore I could hardly walk. I’ve been up for a few hours now and they haven’t gotten any better. My lower back is also slightly sore. And my belly has dropped a TON. My hips/legs/pelvis are just so sore and heavy feeling. What could this mean? Anyone had this? Should I call my doctor?