Need advice !!! And answers!!!

I have a rottweiler that is obviously preganant. She is on day 58 from first breeding.I work at a veterinarian clinic so I took her to get x Ray today and to my surprise nothing showed on the x ray no skulls backbones just lots of poop. The doctor that is there as a temp. Said she didn't know what to say. Has anyone had this happen or do you think it is still to early??