Some questions to consider with regards to the pain that you are having include have you noticed any radiating pain or numbness
that travels down your leg? Does the pain and numbness worsen or improve depending on your position (i.e. sitting, standing or laying flat)? Do have you any decrease in range of motion in your hip? Do you have any improvement or worsening of pain when bending forward (i.e. bending over a cart for instance)? These questions, along with your medical history and clinical exam will be helpful for your primary care doctor
to better ascertain what could be the underlying cause of these symptoms and the appropriate work up. This may include imaging studies and perhaps a referral to a specialist. It is possible that since the workup for anything going on in your hip did not reveal any pathology, it may be possible that you are having symptoms because of compression on the nerve roots exiting from your lower back. Sometimes these symptoms can mask themselves as pathology within the hip, and it is easy to miss these symptoms. Of course, it is improtant that you are evaluated by your primary care doctor as he or she will best be able to decide the appropriate work up.