don't feel too bad, a baby takes a lot of time!
now that she is cleaned up, put some antibiotic on if you have it, or better yet, nustock. Nustock is the best thing for wounds - sulphur in a pine tar oil base, keeps infection away. I've used it many times on chicken injuries from hawks and dogs and never ever had a problem. Avail online and at feed stores, sometimes kept in the sections with horse meds. Another option which might be easiest at this point, better than the ointment or nustock, would be to get some pure sulphur - flowers of sulphur - make sure it is 100% pure. it is usually at garden centers or in the garden section, and also online. THis is a yellow powder, and you can just sprinkle it on the open wound and you are done!
At this point, I would not cover the wound, but would keep her in a kennel with old towels, sheets, whatever. Means extra laundry for you but better than hay or shavings that would adhere to her wound. If you feel like you have to cover the wound, check it frequently. You may need to clean it.
You can give her extra protein to help heal, that would be scrambled egg, meat.....
You can still let her out now and then, and it would be really great if you could keep her near the other chickens. better for her, and makes it easier to integrate her back to the flock. Plus, you won't have the smell of her droppings in your house!
If you don't have a dog kennel, maybe borrow one, or if your coop has enough room, make a separate temporary area for her with chicken wire or plastic netting.
Good luck!