You may have pups that are stuck. I'd be really tempted to see the vet and expect potential for a c-section.
My last litter I had two pups try to get in the birth canal at the same time and neither would give way for the other so we had to do a c-section.
I agree the temperature flux is odd. But at this point if you want to be sure to save the pups I'd call on the vet for help.
You can while you work on that see if giving her a calcium tablet or some cottage cheese etc helps her go into labor. Sometimes electrolyte imbalance can delay things. Let her drink plain pedilyte too.
Uterine inertia can be an issue too.
If this dog is like ones my friends and I know sometimes the bumpy ride to the vet triggers delivery of the pups.
But I would not risk waiting longer to have the vet check her.
Hope this helps you and that all goes well!

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