A break, sprain, or something else will make her "down in the dumps". It might just be bruised, but do keep an eye on her because the breed seems to be delicate. Maybe give her some kind of treat....Like: bread, cooked rice, cooked oatmeal....or what ever is her favorite to boost her spirits. Even if the wing is broke (which I hope it is not) she should still be fine.
I had a different breed hen break a wing and after it healed she was still flying up (kind of like hopping) short heights to roost at night.
There are other things you can give her. Most would say vitamins and electrolytes (which would work too). I prefer injectable B12 (this too will give her a boost), but with her age and size you would only use a Very Small amount, and you would have to feel comfortable giving it to her. No fear though B12 does come in other forms other than injectable.