"PSA NUMBERS"
There is no "normal" PSA number. Most "elevated" readings in the gray area of 4 to 10 are traced to benign causes, as many things can cause this including infection/inflamation and the most usual cause of an enlarged prostate which produces more PSA.
For a PSA reading to have any real meanaing, size of the prostate needs to be factored into the equasion: your specialist will have taken note of the prostate size and can provide further advice on that aspect.