What Causes Pain From Hip To Toes With Parotid Gland Cancer History?

I have been having pain in my hip running down to toes. I started water aerobics and just thought initially it was sore muscles only in one leg. Four weeks later I still have the pain I have a history of parotid gland cancer(ACC) which was removed and followed 35 radiation treatments. A year later I had a pet scan and many small tumors showed in lungs. They told to do nothing about lungs until I either cough up blood or have a severe cough. Then I started having tumors on head and had 3 removed at different times and have another to be removed now. I had a tumor on T-4 and had 5 radiation treatments on it. Have been having problems with lungs and finally had radiation on lung because 2 large clusters of tumors were on both sides of bronchus. Now back to legs-thought orignally cramps-went to emergency and had ultrasound and blood tests-nothing showed up. The pain is getting worse I have been taking oycodene and muscle relaxers every 4 hours. I am in process of moving to AZ and have found Dr Biggs for radiation and Dr Ronn for pulmonary. What kind of doctor do I go to next. Been waiting to get approval from insurance to CT Scan of both lungs and abdomen and pelvis. I am afraid it is cancer in hip Everyone I have talked to says to use heat mostly but lots say heat and ice. I did go for Medical Massage but that didn t help much and she said not to go to Chiropractor in case I do have cancer in hip. Can you tell what to do next. Cindy Fischer