As you've seen from others already, it is normal when on BCG.
Infection can also cause elevated PSA.
I had a couple of biopsies done on mine because they found some lump when they did one of my TURBs. (Why they were checking that, I have no idea). It was just some sort of inflammation though. Not that it would matter now, since they removed my prostate later when they took my bladder out.
Since the doctor is aware and knows why, it is just something to note and then keep an eye on. If the doc has any suspicions, he would probably do a biopsy. Not fun but not so terrible either. It's an in the office procedure.
Mike
Age 54
10/31/06 dx CIS (TisG3) non-invasive (at 47)
9/19/08 TURB/TUIP dx Invasive T2G3
10/8/08 RC neobladder(at 49)
2/15/13 T4G3N3M1 distant metastases(at 53)
9/2013 finished chemo -cancer free again
1/2014 ct scan results....distant mets
2/2014 ct result...spread to liver, kidneys, and lymph...