Going thru this website, you will find your experience is common. Every once in awhile, it helps, but as DPCARE said, at least they eliminated more serious problems. The next steps are probably seeing if any of the other help topics here can help you. Eating or drinking certain foods or liquids, and when. Not only caffeine, but sugars. Amounts of liquid. Various chemical additives. Various sugar substitutes.
Prostate cancer, chemotherapy, prostate surgery, actually didn't have a very serious effect on me, unlike some here. Two other operations quite a few years later did. Brain cancer increased it to the max. A year and a half plus later, it has gotten surprisingly better, and I'm reasonable sure it was helped, also, by diet. Klegals didn't do much for me, and i practiced them religiously, but others have found they definitely helped. Weight loss helps a lot of people. I've yet to see incontinence listed as a side effect of a prescription medication, but what do I know? And what do the docs know? And what if you take a lot and they interact? There are some really good threads here. Watch for MayMay, she's on a lot of them.
Any chance you have some other conditions that aggravates it? Ask the doctors. Sometimes it is better to ask the nurses.
Good luck.