[Cha Cha]

Pyometra can be an open form with drainage or a closed form where it is contained to the uterus. The closed form is very hard to detect until the dog is very very sick.
My Moka had pyometra at the time of her spay which was a few weeks after she went out of heat. She was young, around a year. Hers was closed pyometra meaning that there was no discharge or drainage because she had gone out of heat and her cervix was closed not allowing the infection out. The closed form is very hard to detect, and my vet actually thought she was pregnant, and wanted to stop her spay until I told him there was no question, she had never been exposed or bred without a doubt. After he removed her uterus he opened it to see for sure and it was full of infection. Her spay saved her life. I agree that your baby needs to go to the vet.