In the short term, head to the vet and have a discussion with them regarding keeping ears clean and dry.
In the long term, these can often be a symptom of food allergies. What are you feeding now? Shoot for something corn- and wheat-free and maybe look for something that has no chicken or beef in it.
I’m guessing you’re inexperienced with regards to breeding and lack a breed mentor to help you…that means you need to call the vet who has monitored the dam throughout her pregnancy.
Please go see a vet. I know money is sometimes an issue, but try to apply for care credit, or something to get your dog looked at. Is she eating? Is she Drinking? Are her gums nice and pink or white looking? can she walk?
Please call a vet!