
My small breeds often don't look pregnant until the last week! If your girl is like this, you have a bit of a wait! :-)
One of my girls finished her season well over 6 weeks ago, and her vulva is still very large and she was not mated. I have to be honest that I often think that I am the only one on here that doesn't get into a state wanting to know!
I know that the folk with larger breeds will have far more need of wanting to know numbers, but, with the small breeds, knowing that we won't have 12 pups to rear, I just sit back and wait, and treat them as pregnant, until the due date arrives.
With smaller breeds thay can hide pups for so long. One bitch didn't show until very, very late. Several days before whelping I knew that I could feel one pup, so that was all I was expecting. Then, one night, she was next to me on the sofa, and her tummy did one almighty roller coaster, as a pup came down from under the ribcage. She whelped two pups the following morning.
Time will tell. :-)