Maybe posting a picture would help. When you touch the wound, how does she react?
Don't feel guilty. Chinchillas are curious and silly little animals <3 Just monitor her carefully, make sure she's eating, drinking, and pooping. My Doodle has actually bled multiple times from wounds and has been fine (hope I don't sound like a bad chin mom--- he just has very very dry feet and sometimes they crack
). Also, just a tip: you might want to consider making a room chinchilla- proof. I personally do something CRAZY (I live in a 1200 sq. ft. apartment in NYC): I set up a dog run gate in the living room. Doodle and I play in that tiny area. I cover it with a bedsheet because chins can jump super high!!
Anyway, good luck with your little girl, and welcome to the community
--- Dvora