WHY IN THE WORLD would you be breeding your female when you don't even have a JOB
Nevermind that she's too tiny to be bred
I sure hope you are not for real! If your vet can't tell if she's pregnant or not at this late stage, I'd suggest finding one that's not so dumb. Your tiny little girl is going to need an expert vet to get her through this with her life.
Shame on you!!!!