For me it is simple, I go to my doctor and say I am having a lot of bone pain may I please have a bone scan. I am worried about the cancer coming back. My doctor is so good he will either just order it, or talk to me about what else he might do to check on that. The osteoporosis can cause bone pain as well, but if that is worsening then that is a signal from your body. How soon before you have a doctors appointment? What kind of doctor is monitoring you for cancer?