Thanks for the quick and comprehensive response Doctor Y. It did give me the 2nd opinion and more information that I felt I needed.
It sounds like the scar tissue has left my bladder less flexable, and the muscles less able to control the muscle that stops out-flow from the bladder into the urethea. If there are muscles that close off flow once urine is in the urethea, it feels to me like they are not working either, so there may be scar tissue also. It sounds like don't hold my breath waiting for the body to replace that scar tissue. It's sure a mess.
I'll follow your advice to try a third oral medication, when I see my urologist. maybe we'll hit one that works.
Thanks again for your expert and valued input; and have a good day.