As you said, it could be many different things, including infection.
My PSA rose 5.4 points in 3.5 weeks, but then again, I was/am a cancer patient.
I realize you are concerned, but you are doing the right things. Get it checked again and if still up, ask the doc about infection being a factor.
Best of luck to you.
Danman Bob, Born 1951
Nerve-sparing, open prostate surgery November 13, 2007
Gleason 9, PSA 14; Biopsy result - 9 of 12 sticks showed cancer
Post-op pathology results - cancer confined to the prostate
100 MG Viagra 3 times a week beginning December 2007
Osbon Erec-Aid Esteem manual pump for therapy beginning mid-February 2008
30 MG papaverine/1 MG phentolamine bimix injections beginning late April 2008
Five week post-op PSA 0.2, five month post-op PSA 0.1, nine month PSA 0.1, 13 month PSA 0.4 (recurrence was likely due to very high Gleason, even though margins were deemed clear after surgery)
Radiation using Calypso Localization System to begin in January 2009