Hi Tarkadahl
As a persistent PSA after RPC club member I Don't attach to much to the "re calibration" "Orgasmic women" detectable PSA explanations. Clearly oncology think you have a problem, what you need now is to understand your options.
Good news is you are fit (you can't play 5a side if you ain't!)
Your PSA is very low
You are hormone sensetive
Things I would ask your oncologist:
What was treated by RT? Just the prostate bed or lymph nodes too? If they did the lymph nodes too then a PSMA scan would not have helped as clearly they hit something otherwise your PSA would be higher. The onco I am seeing always treats the lymph nodes. If he didn't they may be able to revisit them.
With that G5 is it worth early chemo? Or early Enzo, both have QOL issues but there are lots of examples on here of guys who seem to be doing well. I don't know if your blood cancer will limit these options.
Are you candidate for early Lu treatment or trial? This has the potential for great success in PSMA expressive cases.
I doubt they will do anything until you get a lot higher PSA scores and a PSMA scan can be done, but in a way that is good news as it means you have low PSA!