So, I've noticed about every 2-3 nights when I go to roll from my left side to my right, or visa versa...1...it hurts SOOOO bad... but second, as I am lifting my leg and bringing it back down on the opposite side...i hear THIS TERRIBLE loud CRACK! it happens in the center lower part of my back, so I think my hips more so....and it hurts so bad! anyone have any idea why this could be happening?? this is my 3rd pregnancy and I have never herd that sound when rolling with the other 2...and it freaks me out.. I feel like it's hurting the baby.... lol