"I didn't know I was pregnant"

Does anyone know anyone who was pregnant and didn't know? OR who found out super late that they were pregnant? I personally don't know this person, but it happened to my best friends friend. She was camping and drunk and felt sick so she took a nap...woke up and called her friend in the tent and told her she felt like she had to push...well she did and gave birth to a healthy baby girl. I saw pictures of her the week before she gave birth...she did NOT look pregnant. She named her baby Faith.