wanting information on bone cancer

I am 45 years old. I was diagnosed with breast cancer at 37. Went through a mystectimy and chem and then oral chemo for five years.finished oral chemo in october 2010. Left started hurting in february 2011 went back to the doctor and they found a spot on my hip and spine. They then sent me for a pet scan and cat scan and found 12 spots on my bones. I took zeloda for the past year and just recently got put on an estrogen blocker. I want to know more information about bone cancer. Can anyone help me.