My little one did the same things not long ago she is 5lbs and the male was 3lbs. Like you I took her to the vet and no puppies my other one had puppies in her, I did wait till I got down the road to cry for her. The vet told me that since it was her first time and him being 8 months that his sprem count was not high enough they got tied two times on the days she was ready. I sorry for you I know what it feels like, Bless your heart |