Anyone know what’s up?

My mom has had a seriously bad UTI + bacterial infect since October of last year. Doctors messed up her results, and told her she was fine then, but went back this month and got told she had these things, and was put on medication. It was untreated till this month basically. She’s finished with the treatment, and it’s still bothering her. She’s going back to the doctor this week, but does anyone think it could be more serious?

She does drinks GALLONS of water, so that helps flush out the infection, but not enough (obviously).