It's hard to understand why you didn't have at least short term ADT with your salvage radiation.
If your PSA rises rapidly, there are two clinical trials (EMBARK and PRESTO) that showed that ADT with Erlaeda and Xtandi, respectively, can delay progression:
Looks like you had a PSMA PET when you PSA was at 0.39. Generally, the lowest PSA value that can generate detection is 0.5 +. I have waited until my PSA was at 1.0 and the PET has rendered useful information about where I have mets. Dr. Kwon at Mayo seems to be more aggressive with chemo early. You might what to check with Dr. Mark Scholz with the Prostate Cancer Research Institute at Marina Del Rey in CA. Sorry to hear that the PSA is persistent, but you are early in the treatment path so this is the time to dig into your options. Going to your MO is a good step, as is getting the opinions at this point. Best of luck.
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