If this is a significant problem I would opt for the doctor's and getting an xray.

Stretching is probably good for it, as is moderate walking. If the pain is on the outside of the hip joint, then it could be an inflamed bursa like I had. OW.
My chiropractor told me that most actually hip joint bone problems hurt on the inner side of the hip joint, not the outside.
Still, sounds like a doctor visit is in order.