Your PSA is really only telling you "something is going on"; it's more likely that not that the 'something' is chronic prostatitis e.g. inflammation, which is more often than not non-bacterial and hence unresponsive to AB's. The ostensibly negative biopsy confirmed that.
Your situation is similar to mine (I actually have a small amount of G6 - as do many men my age). My PSA is all over the map and the consensus in the medical community I have polled pretty extensively is 'your PSA is largely worthless'. Only mpMRI read by an expert can tell us anything else useful at this point and repeated biopsies aren't good for you, mentally or physically.
So... I think I would read little into your PSA and would discuss getting a mpMRI now and as a baseline for future comparison should your PSA go wildly out of its already mildly wild range.
I will quote an oncologist who reviewed
my case this week:
"Oh my God, I am so sorry about what we have done to you and your life and your wife, you are the poster-boy for why people, especially Doctors should not get hysterical about PSA without context, I am so sorry we put you through this; ignore your PSA, call me if it ever goes over a 12, keep riding your horses more than ever, get an annual or two yearly mpMRI but in the meantime, go and live your life and try and put this out of your mind, we should never have put you through this, look at the damage we have done to you, I am so sorry"I kid you not...
...relax, get an mpMRI next and go from there. IMHO.
Post Edited (Paul65) : 12/4/2015 10:13:19 AM (GMT-7)