MC10010,
Welcome to HW. It sounds like you've had a rough time - was the chemo stopped because of a bad reaction or because it didn't seem to be effective? It would help if you'd include a signature with your current status and treatment history (My Profile>Edit Profile>Signature) and check "include signature" when you post.
I'll guess that you have multiple bone mets, in which case Xofigo and Provenge are good next steps. You can try Xtandi, but it often doesn't work for very long after Zytiga fails. If Taxotere was ineffective for you, Jevtana may work. That's it for the currently approved drugs.
There are many clinical trials of several promising medicines. In Missouri (Kansas City), there is a promising trial of a special immunotherapy (Tecentriq) combined with Xtandi for men, like you, who have failed Zytiga and Taxane therapy. Here are the details:
/clinicaltrials.gov/ct2/show/study/NCT03016312