Anyone know what's going on?

I'm 36w3d and 1cm. For a few weeks I've been having a lot of hip pains and back pain. Starting last night it got so bad I had to get on my knees and elbows and wait for it to pass a few times. And it's still pretty bad this morning. It's hurting so bad I feel like I'm gonna throw up. There's no rhythm to them and they last for a few minutes. I don't think it's contractions or Braxton hicks. Baby is moving normal. I've brought it up with my doc a few times and it never gets talked about.