She was just imagining all of that. None of it was real. She imagined her husband, daughter; her entire life as she thought it would happen, all in the instance before she died. The movie is depicting what is going on in her mind at that moment. So the exact details, ie. her daughters age, husband etc. is irrelevant because it is all a figment of her imagination. And in the end it is revealed that when the lady asks her "Are you one of the survivors" she actually says "No". Also, in the end when the blood starts coming out of her chest, that is when she gets shot in the bathroom as a kid and her life stops flashing, thus the baby disappears.