Welcome to HW. Wish that you didn't have the need to be here -
I would say that one PSA test does not make a trend. You'll need a second to see what is happening. As to a bounce with/without a prostate? What reacts to the radiation is PCa cells, which can exist outside the prostate, so I would say a bounce expected "with" could be a bounce expected "without".
But one PSA test does not make a trend, so wait for the second.