Oh my goodness, sending prayers that the two puppies and Momma will be okay
This vet needs to be reported to the proper authorities, as what he did was so incompetent
I would definitely have a different GOOD vet check Momma and the pups out thoroughly ASAP. Especially if a placenta is not accounted for, she'll need a shot to help with that.
OH, man what a terrible situation, I'm so sorry for this little Momma