Carole, I'm sorry to hear that Lexie has another UTI. I hope that she'll pee soon so you can get a good sample of her urine. I also hope that the meds will help her and that she'll feel better soon. They could be caused by stress but hopefully she won't continue to get them.

Is she on any kind of a special diet? She may need to be on a good uriniary tract diet or be given some supplements to promote good urinary tract health. Some people have given their cats cranberry treats or cosequin supplements to help these kinds of problems. Good luck.