Hi Herb Lady
When you change oestrogen suppressing drugs you need to give them a few months (usually 3) to see if they are working.
I have bone mets and have monthly IV biphosphonate (Bondronat) although this can also be taken orally. This is to support your bones and hopefully prevent spread for as long as possible.
I haven't needed radiotherapy for pain, but it has been offered to me. I know others who have had it, some have had instant relief, with others it has reduced the pain to a more manageable level.
Why not ask about adding a bone support to your treatment - Bondronat, Zometa, Xgeva or Aredia?
I would opt for the second opinion, give the change in tablets a chance to work before taking the more drastic route of chemotherapy. Cancer markers are unreliable just after a change in treatments, if it works it kills cancer cells and these dead cells are picked up by the cancer marker tests and give rise to a "tumour flare" although a few months down the track they will become more reliable.
With love
Joy K