I'm thinking of you guys and praying.
You want to offer her everything she likes to eat especially warm foods. Like oatmeal , cooked mashed sweet potatoes, scrambled or boiled egg..
On trying the baby burd formula, make sure its warm, near yogurt thickness. Yiu csn offer by spoon.
If you hsve a feeding syringe, sometimes poking it through the bars, will have tgrm come investigate, and then you try to drop to them. Or you can gentle corral them while tyey stand with your left arm, and try and come just off center ,barely, of the left of beak tip sbd drip in, mine that liked it right away would swallow and then open beak fir more. The opening to their esophagus is on their right, so coming from the left sort of aims it that way. I go slow and just give a couple if drops in the beak and wait for them to swallow.
Or you can offer in a coffee mug or little dish if she will come and explore and eat on her own.
If she isn't eating at all. And you feel comfortable wrapping her in a towel and trying to drip in her beak you can try that. there are you tube videos you can watch.
You just want to be careful, not to make them choke.
I do hope antibiotics, and pain meds have her feeling a tiny amount better.
Keeping the house warm as yiu csn stand it . And looking fir safe ways to provide supplemental supporting heat, really helps birds. Your aim is get the environment 80-85f