The symptoms you are describing sound concerning and warrant a vet visit. I think you should give a call to your vet to help her and her puppies who depend on her. There can be many things affecting her, but only diagnostic tests can really give you an idea of what may be going on. I know that the coronavirus is scary and a lockdown seems to imply we should never leave the house, but you are allowed to leave the house to take your dog to the veterinarian even during a lock-down considering that veterinarians (especially emergency veterinarians) are an essential service. If your veterinarian is closed, you can take your dog to the nearest 24-hour emergency veterinary hospital. Make sure to adhere to several measures once out such as social distancing and make sure to wash your hands and not touch your face.