Did you have LDR or HDR? My experience with LDR and Iodine-125 seeds was that as the seeds start getting their "hottest" I noticed slight symptoms - nothing like what you're discussing however. I was on (1) Rapaflo per day and that kept things going if you will. I also did Ibuprofen 2 tabs TID whenever I felt any issues going on as they helped reduce the effects of the prostate swelling from the seeding.
Edited as I just realized this is an older thread.
usmjvt - So how are things going now that it's a couple of month's down the road? Hopefully resolved? Did you get on that Caribbean cruise?