I see from your post in September that you were 45 years old then.
I would keep doing what you have been doing. Keep the 6 month PSA test going and see if anything changes.
I had 2 biopsies and PSA's up to 9 before 2004 and no PCa showed up. But then I guess I thought I was bullet proof and went 8 years without another PSA. My numbers below show what happened with that plan.
You should be fine for awhile, enjoy life!
Bill from Florida
Age - 63
Feb. 2012 - PSA 18.5 Biopsy 4/27/12
Positive 10 of 12 cores, Gleason 6 then
Da Vinci Surgery 07/17/12, Dr. Vipul Patel
EPE, positive margins, Gleason 3+4=7, involving 50% of gland, prostate weight 57 g. Stage pT3a, Lymph node involvement: 0/4
All post-op PSA tests through 10/15/13 undetectable <0.1
PSA 1/15/14 0.1, 4/1/14 - <0.1, 6/24 - 0.1
AUS AMS 800 installed 4/11/14 finally dry