Notoriously unreliable test. You can have a raised PSA and not have cancer (three-quarters of men with a raised PSA do not have cancer), and a non-raised PSA and have cancer. It is advised that otherwise well men with no classic symptoms ( pain when peeing, having to get up often in the night to pee, or urgency to pee) should not get a PSA test.
I wouldn't - can lead to unnecessary unpleasant further investigations. Most men with prostate cancer will die with it, not of it.
Of course, if you do have any of symptoms above, see your GP immediately.