It might be cystitis.

I am urinating so frequently that I suspect it might not be just an enlarged prostate. Sometimes I feel an uncontrollable urge to urinate. When I get nervous, I have to urinate within an hour.

I often drink water and like diuretic herbs, so that might be a reason, but I also plan to get a prostate ultrasound during my health checkup.

Let's also consider the possibility that it might not be a bladder infection.