Possibly pelvic girdle pain or SPD I have it my pubic area back and hips hurt also hurts to turn in bed etc. Mention it at your next appointment also wearing a maternity belt helps to elevate pain in that area as it supports and helps lift bump so its not so much pressure on pelvis. I have one and find it really helps.x
Does it feel like menstrual cramps
Did you work a long shift at work