I first saw "bewildered fear" in a book by Bertrand Russell:
And in a more or less analogous way any questioning of what has been taken for granted destroys the feeling of standing on solid ground, and produces a condition of bewildered fear.
More instances can be found on the web, including this one from Alfred Kinsey:
The history of medicine proves that in so far as man seeks to know himself and face his whole nature, he has become free from bewildered fear, despondent shame, or arrant hypocrisy.
How could fear be bewildered?!