This is really not something you should be fooling around with. GO TO THE URANOLIGIST and get it checked.
Problem with listening to folks who HAD (Emphasis on HAD) a friend is that it's can RUIN YOUR health.
PLEASE consult the doctor and at your age, get a PSA test, if only for a marker.
Whatever you do, don't wait til nothing can be done. Modern medicine is terrific.