If it's her first litter,it wouldn't surprise me. one thing to do is to watch from a distance let her be. Make sure she has a place away from traffic in the house, warm and with plenty of food & water, nursing puppies can take a toll on the mother in a short time frame. While she is nursing give her Puppy food, it is best for nursing mothers.
Humans usually don't have to do much of anything other than to keep an eye on things in case a puppy is not nursing or something like that.
Let me know how she & the pups are doing.
Regards, Barry
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