It's just bruising, I wouldn't worry about that.
Work on hydrating her. Small sips of water. Careful if you are syringing fluids so she doesn't choke.
Do you have a parent, neighbor or family member that can help you with this?
No, she's not been stung.
It looks like she's been injured or beat up.
Just follow the previous advice from @azygous clean her eye and apply the ointment.
It's good the ear canal is clean. The earlobe looks like it may have been pecked, so that may be why it's swollen.
Keep your hen...