Sandy....I just finished mine in October and have no pain at all. You should have been told to drink 30 Oz of water 1 hour before each treatment. I was told I needed a full bladder every time and they did the Ct scan or xray of the bladder on the same machine each day to see if my bladder was full enough. If not I was told to go drink some more water and try l;ater.
Not sure if thats the problem but could be.
The reason is that a full bladder will push the prostate away from other healthy areas that dont need to be radiated and cause pain down the road...at least thats what they told me.