Dave, "probably" everything is fine. However your FPSA score in the intermediate range really tells you nothing. My last pre-biopsy PSA was 4.2 with FPSA of 17. Assuming that the PA guessed right on the size of your prostate, the better news is that your PSA density (PSAD) is relatively low (PSAD is PSA level divided by the size of the prostate). For example my PSAD was .155 (4.2 PSA divided by 27cc prostate). Your PSAD is .092 (3.7 divided by 40). I recall that one of the Johns Hopkins health bulletins stated that PSAD over .15 indicated a high risk of PCA.
However...I'm not a doc...but the last time I looked "PA" didn't mean "M.D." either. If you are depressed and losing weight over this I guess I still don't understand why you don't insist on seeing a urologist (not a PA) ASAP. Again, "probably" everything is ok...but don't you want a physician to tell you that instead of an "assistant"? Just my take.
Age 62 (64 now), G 3 + 4 = 7, T1C, PSA 4.2, 2/16 cancerous, 27cc. Brachytherapy 12/9/08. 73 Iodine-125 seeds. Procedure went great, catheter out before I went home, only minor discomfort. Everything continues to function normally as of 12/8/10. PSA: 6 mo 1.4, 1 yr. 1.0, 2 yr. .8. My docs are "delighted"! My journey: