I hate to say it, but she doesn't look preggy to me....her pooch is withdrawn, not like my girls when they are preggy, they are soft and just a bit inflamed. But then, I could be wrong, so keep watching her closely! Have you felt any movement? Does she eat less? Is it possible she got in with the buck at a latter date?
Sorry, I don't think that looks like a pregnant "cha cha". Maybe she had a "5 day heat" and you didn't see it? I have 2 I couldn't get bred in Jan. This year I'm starting earlier, that way if I miss it I will still have time before they stop cycling.