I experienced those symptoms before, over a period of maybe half a year. It felt serious enough that I got checked out by a GP who then sent me to a urologist. Both confirmed they could see nothing wrong.
A curious diagnosis, because to me, this problem felt very wrong. (This was long before I discovered TMS, by the way.) Negative for STDs as well. Eventually it disappeared. Why? Something else more frightening came to take its place, I think. And somehow I just stopped caring about that problem, as horrible as it occasionally seemed. I just stopped caring about it.
In my understanding, urinary/bladder issues are textbook TMS because they're so easily triggered. Want to know the only other time I have a sense that I need to pee every 15 minutes? In the hour preceding a performance or public speaking event. I'm nervous, that's all. Nothing more than that. Some people get an upset stomach before a show (i.e. "butterflies"); this overactive-bladder thing is the way my body speaks nervousness. This isn't a complicated or controversial view of how the mind-body system works, and most people would agree with this relationship of cause and effect. It doesn't have to be much more complex than that.
To sum up, yes, I've experienced what you're describing as TMS, and yes, it is no longer a problem for me. I'd recommend you find a way to just stop fucking caring about it. Let yourself be distracted from this distraction. Hopefully that is all that it will take