Mean girl problems

I have a co worker who recently cornered me in a doorway to yell at me after already yelling about me from down the hall to coworkers and stomping up to where I was.

I told her that I am here for the patients in the building and not for her and that she is not the boss of me and is wasting her breath.She then did leave the room and never bothered me again.

But now I dread every upcoming shift, what are some other ways to defend yourself against a mean coworker without being mean/aggressive yourself? I am not gonna lie I was scared, I have never been cornered by a coworker

(Bosses and HR are scared of her so going to them is not an option)