the hips joints do get slightly wider during pregnancy, but as Teiae said, at 17 weeks it shoudnt be too noticable but who knows, we are all different so it is possible.

I get really bad hip and shoulder pain when im sleeping which has been keeping me awake alot lately. I've discovered something that has helped tremendously....a blow up floatie ring (not sure of its correct name sorry) The ones used for swimming if that helps. I place my hip in the middle of the ring and it seems to prop me up enough so that the my hips are not under so much pressure. I also put a pillow between my knees. With the shoulder pain, i also use pillows to prop me up slightly and it helps to reduce pressure as well.