I share your frustration! I am a nurse and when I have a UTI, it isn’t rocket science. One day I think “hmmmm…I wonder if I am coming down with a UTI…” then the next day I am peeing blood. Same way every time. To people who say “it could be x…” I say “well by the time I get an appointment for a specialist/ultrasound/etc, I could have already taken a round of antibiotics.