Do you think I would be wrong for hitting her back?

A girl who is taller than me slapped me multiple times, and threw a chair at me because she thought I cheated on her friend. I only look like the friend's ex. I don't even know her, and she came with no warning and hit me in the ear. My hearing is still fucked up. I was going to fight her back but a group of guys immediately got rough with me and pushed me down and were very clearly hostile. I wanted to just say fuck it and fight everyone, but then I'd be the bad guy 🙄
Do you think I would be wrong for hitting her back?
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