"Despite the prompt attention of her children, husband, father and other medical personnel, all valiant efforts to resuscitate were unsuccessful. She went home to be with the Lord," the family wrote.
Efforts to save her and her baby were unsuccessful. Doctors have yet to determine a cause of death.
"Our hearts are broken and her joyful presence will be greatly missed by so many," a message on a GoFundMe page for Mitchell's family read.
"Em made a big impact in so many people's lives, and this loss is incomprehensible for anyone who knew her. Our friend was a dedicated mum and wife, she had a heart for the Lord, and loved her children so dearly."