I have experiance on this my sisters neighbours dogs ....so to cut a long story short.....mother was a bichon father a large collie ...on the morning she called me to help at 6.00 am well il help any animal out the puppy was breach and dead and there was another there so i called my own vet to help as she did have one

so she was fine but she did have problems having them as they were big pups for her size i think shes very lucky to be alive so you are doing the right thing to get her seen to right away
