Well from all your info I wouldn't worry myself, of course you can haul her to the vet if you are real worried. I bet you she is fine. i ain't had a hound or cur dog yet that needed any help from me having pups. Like I said if she ain't breathing hard or obviously trying to push out pups that won't budge she is most likely ok.
dug this up on google just now, might help ya relax a little
http://animalhealthcare.com/handouts/dogs/Breeding5.htm