When did her heat end? Please bring her to the vet right away. It is possible that she could simply be going into false pregnancy, but you need to get this checked out right away.
Please read this recent thread about what it takes to be an ethical, responsible breeder, so you don't make this mistake again.
http://www.rottweiler.net/forums/sho...threadid=20470 Also, please get your animals spayed and neutered, because by producing litters of unplanned puppies you are adding to the already staggering number of unwanted animals in this country.