Like everyone has said, this is a bit much. But you know what I'd do? The evil me says to send her this thread, with everyone's reactions so she could see how much of an a$$ she is!!!
For everyone here to react the same way shows you that she is a bit off her rocker & not normal!
Okay, now back to the nice me, really, like others said, ignore her. Right now you're probably reacting exactly like she wanted you to. Just notify security & your WC. If you have a picture of her, print it out & give it to them so that they know who to look out for. Other than that, I wouldn't give her any more thought & I wouldn't email her or call her again. With every email & every phone call, she's thinking that she's got you all crazy, which again, is probably what she wants!
But, while you're there, if she even looks like she's coming your way, grab your girls & be ready to do what you gotta do!!!
Hang in there & forget about her!