It is not necessary that your dog is going to deliver very soon because she has started producing milk. It can take 1-10 days after milk production to give birth. In some dogs, milk is produced after the delivery. So, you should wait for signs of labor in your dog or you should take her to vet to get abdominal ultrasound that can give you following information.
- Expected date of delivery
- Possible litter size
- Birth defects