Cute type for a female = fale.
Here is a website that might have some answers to your questions:
Dog Breeding and Canine Reproduction by Debbie Jensen. Dog Breeding and Whelping guide for dog breeders.
If you are only feeding dry, you might try a bit of pro biotic yogurt in with her food. A bit = tsp full.
Also feed more often smaller amounts and see if she keeps it down.
But if she is repeatedly vomiting - trip to vet is in order
Good luck with the pregnancy and whelp. But I hope you did check all the studs pre breeding tests on the appropriate health sites. OFA, CERF, CHIC.