Well, I spoke to my doctor this morning and things are not as bad as I feared.
The two diverticulum on my bladder contain no stones, so for the time being nothing will be done to remove them. I'm going to continue on the medication I was given and in three months will have another x-ray taken. Dr. Randall tells me that he has patients who have had these for years and they caused no problems. The surgery is pretty invasive, with a week to ten days of recovery, so if I don't have to have it done I would like to put it off.
Thanks to those who have written or called me about this. I appreciate the concern.