> Well she has been running
Do you mean you allow her out unsupervised? That is so irresponsible on so many levels.
Bitches can have silent seasons with no blood but all the other signs, and become pregnant, also bitches can have very convincing false/phantom pregnancies.
Surely you would know if she had been near entire dogs??
I would take her to the Vet for an ultrasound, but then if the pregnancy is less than a month or the vet inexperienced it can be inconclusive..