First, she should faithful, detailed, record of what happened.
Then she should first go to her parish priest for counsel.
And if he does not feel qualified to deal with mystical phenomena (I know I’m not), she should seek his advice for one who is.
And if necessary, be willing to wait for as long as it takes to find one with the right qualifications.
Her written record of when, where, and other details will be useful in determining their significance.