The sensible thing to say, Ray, is that there's no point in getting stressed. An elevated PSA is grounds for investigation, nothing more, although your family history does significantly increase the probability of you developing prostate cancer. If you do turn out to have prostate cancer, then you probably already know from your own family history that localised prostate cancer is not a death sentence, but an eminently treatable condition.
Next steps will be a urology appointment almost certainly followed by an MRI scan and biopsy. It's now just a waiting game. Unfortunately it'll be at least a month before you know the outcome, so try (and I know that's more easily said than done) to simply wait for the test results rather than dwelling on worst-case scenarios.
All the best,