You meant for it to mean something along the lines of "spooked," yes? Not, as dictionary.com claims, as "to make or become wildly excited or enthusiastic."

So there's 'spooked,' which doesn't have quite the same connotation but is close. There there's 'disconcerted,' 'disquieted,' which I don't think are strong enough, or 'distressed,' which would probably work okay if you want her to have an air of understatement. I'll get back to you if I think of any more.