How is she doing now? I always take my mother in for a full physical three to four days after birth, when the pups get their dew claws removed. Panting is not normal that I have noticed, but bleeding is very normal for many days after birth. The first litter, she only bled for a couple of days, but this last litter, she has discharge for a couple of weeks. Good luck, you probably are not sleeping much right now.