you can lay down on the floor near her to let her know she is safe. if you are safe, so is she. it may take awhile. I have one girl who will hide under the bed. Moving to Texas from Colorado did not endear me to my cats at all. I have mama and her two girls. one very timid. the bed one. they are doing so much better now. Kittens are resilient and love to play. Sooner or later she will come out for food and water and lots of loving.