if doing active surveillance, you can add to your monitoring routine the % Free PSA test, and the PSA3 test.
Both of these are simple and relatively inexpensive blood tests that could help you track over time and would give you another heads up that a cancer is developing, or if there is one, that it is changing its behavior and becoming aggressive.
"PCA3 has been shown to be useful to predict the presence of malignancy in men undergoing repeat prostate biopsy. This means that it could be useful clinically for a patient for whom digital rectal examination and PSA suggest possible prostate cancer, but the first prostate biopsy returns a normal result. This occurs in approximately 60% of cases, and on repeat testing, 20-40% have an abnormal biopsy result."
These are usually used with someone who has a rising PSA but it is not yet in the range where it is obvious that they need to do a biopsy, but it could have value here as well.