Bob: First ask you urologist for antibiotics to rule out infection as a cause. At your age, your numbers are too high. I will also say that you may want to find another urologist, since this doctor is much too complacent. Today, the new "trigger" number is 2.5 (not 4.0) for us younger guys.
I was similar to you and bumped around the 2.2, 2.3 2.5, 2.7 range for many years in my mid 50's' My first PSA at age 50 was 1.5 and I knew that even though it was less than 4; it was too high for a 50 year old. My urologist also stressed that free PSA did not apply to those under total PSA of 4. My online reading of medical articles showed that free PSA was indeed a useful number at PSAs BELOW 4 and I showed these articles to my urologist who still dismissed them. I did the antibiotic routine and refrained from sex but could not get lower than 2.5. Finally when my PSA reached 3.3 at age 58 and my free PSA went to 21%, my urologist finally agreed to a biopsy. I was sedated and it was like a nice nap. It did come back positive with 1 of 12 cores positive at Gleason 3+4. I had robotic surgery and it was downgraded to Gleason 3+3. I have no issues and am glad that I had surgery.
The good news is that you even if they find prostate cancer, it should be at a very curable stage based upon your numbers. Good luck.
Bill K. from NJ
Age 58, PSA 3.3, free PSA 21%, neg. DRE
Biopsy 5/2011: 1/12 cores positive at 30%, Gleason 3+4=7 prostate estimated to be 50 grams.
DaVinci surgery 7/2011; Downgraded to Gleason 3+3=6, 10% involvement, contained, neg. margins.
Immediate urinary control, but ED took over a year to resolve.... Now good to go. All subsequent PSA < 0.015.