I have studied your case with diligence.
Due to cancer osteoporosis
is very common osteoporosis leads diffuse pain in back.
you can start medication according to level of osteoporosis with DEXA
You need to start supplement of calcium with vitamin D, vit B12, and if osteoporosis is severe then bisphophonates can be started.
Forsteo has less side effect than prolia
I will advise you to do regular physiotherapy
and exercises as my patients find much relief by these therapies.
You need to take diet rich in calcium and vitamin D.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.