My jack russell gave birth to 6 puppies 4 days ago. She now still pants a lot - not constantly, but frequently?

I could not tell if every placenta came out, as she quickly ate whatever came out behind the puppies. Besides the panting now, she is wandering around out house a lot, sniffing in every corner. She still loves to run outside to greet people who are arriving (we're at a lodge in Malawi - closest vet is 400km away) and to play on the beach and wander around the property by herself. She comes back to check on the puppies often. It's the panting which is worrying me. Can eclampsia show this early? If we have to drive 5 hours to get to a vet, is that enough time if she starts showing other signs of eclampsia? Does it help letting her drink milk and eat cheese and sardines for calcium and Vit D now, or does it have to be intravenous when the budgie hits the fan eventually? She is still my baby and I will be devastated if anything goes wrong! Thank you.