Oops, I ate a zombie

Nora was a normal college student with a normal life. Until her car accident. In the hospital, the doctors said her death is inevitable. But a new treatment could bring her back to life, so with five other patients, the process begins. When she finally awake from her coma, those five patients are turned into zombies, the apocalypse has begun. She changed too, but why her stomach only accept those zombies...