It sounds like you are in the first stages of labor. Watch her closely, as she may not give you much other warning before she starts pushing.
Be sure she doesn't push longer than about 30-40 minuets without a puppy being born. You need to get to the vet ASAP at that point.
Hoping some other breeders will jump on here...I have to go, but wish you the very best of luck.
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