My doctor doesn't seem to care ...

This is my second pregnancy and I'm 27 weeks. This whole pregnancy I've had severe back pain and severe pain in the front as well . Like my lower hips. The bones actually crack, they hurt no matter what I do . If I walk, if I stand, if I sit, if I'm laying, the pains are always there . I also feel pain on where would my kidneys be. I'm only concerned because this didn't happen with my first pregnancy . This time, it's really bad and sharp pains. Also get cramping too. I told my doc but they never want to check to see if anything is wrong .