Need a pain doctor.

I'm so worried at the severity and progression of my pain symptoms lately. I'm having frequent occipital and temporal headaches. Bad muscle spasms in my back. Sharp back pains. Muscle aches, especially in my legs. And scariest: pain in my knees and hips when weight-bearing. The pain lingers after I've been walking or standing. It could be a sign that my loose joints are wearing thin already. I need to get to the right kind of doctor, and soon. If only I knew what kind of doctor could help me.