Rose managed to get back to the real universe without tearing a hole in the fabric of reality. She does this by making a machine that folds not tears the walls of the universe. She got back about six months ago and has been looking for the Doctor. She knows he will turn up soon. To pay bills Rose took up a job at Torchwood that Jack Harkness had offered her. (This is before the meta-crisis Doctor is created and the Doctor is traveling alone at the moment.)