To add, chickens usually calm down and feel safe when you hold them firmly around the wings and body, its a bit like swaddling a baby. So, being bound for a few days could be comforting for her. Also being in the dark is very settling too.
Instead of a water bowl, try teaching her to use a hamster water bottle in her box/cage. It won't tip up and soak the bedding, and keeps the water nice and clean. Mine love theirs.
You can use a medicine syringe to give her antibiotics, and water if need be. Just squirt it slowly into the side of her beak while her head is pointed upwards. You should see her swallow. Mix it with sugar water if she doesn't like the taste. And perhaps add a chicken booster/multivit to her water to help her recover.