66 Year Old In Good Health Last Blood Test 60

66 year old in good health last blood test 60 days ago were good except for PSA level 5 the PSA WAS 4.5 about 18 months ago. Last exam of postate nornal with urologist. Have follow up appointment this week due to higher PSA levels. Last DR. now retired said due to age higher levels could be expected. Have history of kidney stones passed a fairly large one last week.