They're lovely puppies - I love to see them when their noses are just getting colour. I think the tri girl looks very promising - have you a favourite?
Also, as they are so cat like, folks don't understand their not "listening". So the corrections get harsher and harsher.
Sigh.
Education is the key for folks…until they do, we will have many dogs in the wrong homes.
Did you confirm pregnancy? You need to get her to a vet. They will probably need to do x-rays and if an ultrasound is available then ultrasound to check heartbeats for fetal distress.