good luck suzanne--poor lucy, i would probably do what you did, hesitate about having such a procedure done. but it would be a hard decision, not knowing what the right thing to do it. what antibiotic did they put her on? when zack had colitis, the symptoms went away of Flagyl right away, but then came back after the Flagyl, and it bothered me that the prescription was to put him back on the Flagyl again, same dose, same length of treatment. Same thing happened again. I worried about anti-biotic resistant organisms multiplying, among other things. They put him back on it a third time, then while he was on it, i switched vets, and she took him off it and put him on another one, sulfasalazine, but he continued to get worse, so then she put him on the flagyl again while continuing the sulfasalazine, and the diarrhea symptom cleared up right away, again, but the vomiting didn't improve at all. i ended up eventually taking him off everything, went to different vet. the first vet had been ready to d exploratory surgery.
I only had one UTI in the past 30 years or so, it was about 3 years ago, it involved the kidney (that's something to worry about with UTIs). During trying to get that to heal, i found out about and used something called
U-Tract, which i got at the homeopathic pharmacy, it's not homeopathic. It's like the sugar in cranberries but way stronger, it's called D-Mannose, cranberry didn't seem to help but this U-Tract stuff did seem to help. It's a white powder that's mildly sweet that i mixed in water and drank according to the directions. At one time, i had some kind of fact sheet on it that talked about some research that has been done with it, i tried to find something on it on the web just now, but all i could find were a bunch of sites that were selling it. You can take it preventatively, like if there's a certain activity that triggers it, you can take it before. i think that at worst it would be harmless, if not truly helpful, but it was fairly expensive.
i hope Lucy gets better right away! good luck