Has there been things going on in her life that have caused more than usual stress for her? Often times people feel the need to break away from technology and attempt to have face-to-face interactions. Sometimes being in front of a computer device frequently can harbor more depression. Those are just some thoughts based on my own personal experience as well as from what I've discovered with others. Give her some time away. Try your best not to worry yourself and after a while try to contact her. I hope for the best for you. The world has a way of throwing challenges our way but eventually things find a proper place.