PSA JUMPS

I HAD A RADICAL IN 05 TOLD ALL WAS GOOD AFTER 3 MONTHS PSA 0.04 STOOD LIKE THAT UNTIL MACH O7 PSA WENT TO 3.56.GIVEN BONE AND CAT SCANS ALL CLEAR WAS GIVEN COSADEX AND LUPRON.PSA WENT TO .34 IN DEC OF 07 UNTIL MACH OCH OF 08 HAD 39 RADIAION TREATMENTS WHEN DONE WITH RAD IATION WHILE ON DRUGS PSA WENT TO 0.07.SO WEWAITED 3 MONTHS TO SEE WENT BACK PSA WENT VTO .7 SAID IT COULD BE RADIATION BOUNCE WENT BACK 4 WEEKS LATER JUMPED TO 3.46 SO PUT BACK ON LUPRON WAITED 4 WEEKS WENT BACK TO 1.18 WENT BACK 6 WEEKS LATER BACK UP TO 1.46 SO PUT ON COSADEX AS OF 10/31/08 HAVE TO GO BACK IN 3 WEEKS FOR ANOTHER LUPRON SHOT CAN ANYBODY OUT THERE HELP WHY SO MUCH UP AND DOWN SCARED TO DEATH WHAT HAPPENS IF LUPRON AND CASODEX DON'T WORK SOME BODY PLEASE HELP