First, if you’re a man, get your PSA checked at least once a year. If your doctor doesn’t do them, find another doctor. If you’re over 40 and your doctor says they don’t start PSA tests until 50, say you know a guy who’s 43 and has a tougher-than-usual case of it.
If your PSA is at all elevated get a biopsy. Don’t let them scare you away from that. Done by a good doctor it hurts less than having a cavity filled. If you get a negative biopsy, great! If the PSA keeps rising, though, get another one. It’s probably nothing. But you need to know.