question: hi...saw my urologist today..PSA has been erratic for a few years up and down. Today it was the highest it s been at 4.98. The digital exam was normal. Soft and smooth he said. We re going to retest in 6 weeks and he says no sex or masturbation 2 weeks before the blood test. Thoughts? How can we tell if it s BPH instead of cancer or is there no clear cut way unless you have a biopsy?