Hello girls, for a week now my pelvis has been hurting and it hurts wh…

Hello girls, for a week now my pelvis has been hurting and it hurts when I turn from side to side while walking and turning my body. The bones crackle. It's painful to tears. The doctor prescribed calcium at 22-23 weeks of pregnancy. What could this be? In my first pregnancy, I didn't have such a thing. Thank you all ?