Chemo for Bone Mets

I just want to ask anyone with Stage IV BC who is Her2+++ Er/Pr- , with mets to the bones - what chemo combination are you taking?

I have an aggressive tumor that has proven to be resistant to AC, Taxol/Carbo/Herceptin, and Navelbine/Herceptine. The lesions continue to grow in size and intensity.
I am trying my best to stay positive but this is one of those low points when I fear I might not see my little girl grow up.
Anyone with the same type of tumor, and what chemo worked for you?

Thanks,
Anna