What Kind Of Doctor To Visit For Butt/ribs/hips/sternum/tailbone Pain?

Hi my name is Irene. I have been having problems in the past with pain in my sternum and tail bone. I also was diagnosed with Bursitis in my left hip. I still have pain there. Now I also have pain in the left side of my butt when I sit down. It seems it is the bone that is hurting. I also have pain almost every day in the back side of my ribs. It hurts more after I have been working for a while during the day. I am not sure what kind of doctor I need to see.