Oh UTIs are the worst! That’s a bummer especially for such a little one. I see your post is already a few days old, so hopefully she’s feeling better by now... but I have a family remedy to share for anyone who might need it.
My Great Great Aunt Lula taught my family that fresh parsley tea (or dry if it’s all you’ve got) is a must have for UTIs. I’ve been using this remedy for years and find it to be amazing. The parsley has a mild and pleasant flavor all on its own, no need to sweeten it or anything. It soothes the pain one feels while urinating almost completely, and seems to calm the feeling of internal inflammation that sometimes occurs. Drink as much tea as desired.
That said, Please be very careful foraging for parsley. I know where I live in California we have a fairly convincing imposter that is quite poisonous. Dried is just fine if you’re unsure.
I’m not positive that this method can completely kill off the “bad” bacteria causing the infection, though mine always clear up on their own after two or three days of parsley tea. Though it’s not a concern for me personally, I’ve heard that some people are prone (genetically or otherwise) to severe UTIs that can become dangerous if allowed to spread. So if the issue seems to be worsening to an extremely painful point after a few days, an antibiotic might be necessary. Especially because she’s so young, I don’t want to deter you from going to a doctor if she is in need of one 😕
Also... if available, cranberries and/or cranberry juice is great to try and clear the infection as well. I’ve done both parsley tea and cranberries at the same time in the past which has seemed to work well. Just be aware that the juices found at the regular grocery are often packed full of extra sugars which could worsen the issue. Avoid cocktails etc. Good luck! 🌿