How can I get my new kitten to come out of hiding?

I recently got a kitten. She is almost 2 months old and has been an outside cat her whole life. I brought her home and she ran straight under my bed. She hasn't come out since I got her at 9 am. It's now 7:50 pm. She hasn't come out to eat or to use the bathroom. This is worrying me. What can I do to get her to eat and to come out of hiding?