It's been an issue for me too, don't have any magic bullets, meds didn't do a thing for me (though some other meds, notably cromolyn sodium, made it worse). Embarrassment has kept me out of pelvic rehab for the time being, though if you're brave enough, that might be the first thing to try.

One thing that I can say is that excess urination is my very first warning sign of hyponatremia - something I struggled with literally for decades until I finally figured it out, and any more I rarely drink plain water without adding an electrolyte tablet, especially in warm weather. Aldosterone production decreases as we age, and that's one of the hormones that helps regulate electrolytes. Sodium is the only nutrient that humans can't get enough of from food alone - all mammals have to supplement sodium, which is why wild animals seek out salt licks and farmers supply salt licks for their livestock. People who eat a lot of junk food don't have to worry about it, but active people who eat mostly real food will lose more sodium in sweat than what we can take in without adding salt.

If you have salt sensitive blood pressure, obviously you'll want to check with your doctor before increasing your sodium intake. There's at least some research that shows that chloride contributes to blood pressure rise in salt sensitive people even more than sodium, and that sodium carbonates (the usual ingredient in electrolyte tablets) are safer for salt sensitive people.

Something to think about anyway.