Clean it with a little sterile contact lens solution. If it's more than a papercut you can put bacitracin or neosporin ointment on it. If it's on her sides or ventral area, I'd put her on paper for a little while to prevent bedding dust from getting in it until it seals itself.

This is what makes live food controversial. You were right there and still your snake got bit. If you hadn't been there it could have been really bad. Thank goodness you were there!

Will she take fresh p/k? IMHO it's safer than live and just as nutritious (can't lose much nutrition if it dies seconds before she would have constricted it to death). I'm a f/t feeder myself but I don't want to flame you, so I hope you don't feel flamed. If you do sorry because that was not my intention.