WOW!!! Sorry to hear of your great problems. I got the seed implants, but not with Cesium 131. I got 68 Iodine 125 seeds back on November 29th. I have had very little discomfort and none of the problems you are having. I do have a little irritation in the urinary tract (for which the radiologist gave me a prescription for Flomax) and a small amount of irritation in the rectum, but that has been all. I go back to my urologist on the 5th for a follow-up visit.
Wishing you the best.