Basically, it revolved around a female protagonist. She was married, and had kids. (Don't know how many, at least three, maybe more.) At some point, thanks to the frustrations/stress in her daily life, she decided to write a book under a pseudonym.
This book, while containing many metaphors, ended up coincidentally having themes which were identical to events which would soon play out around the world. Namely, the fact that the world was, itself, ending. Humanity managed to survive by going into space, but not nearly as many people as planned could actually be saved. She and her family were among them, for the most part, but her daughter (at least one daughter), another major character, died from an infection of a supernatural disease.
This disease, in fact, wiped out half the planned population and risked destroying the entire fleet. Yet it was eventually put to a stop, and humanity managed to escape into the stars. And here's the thing. Her book ended up being taken as scripture. By some force in play, she was empowered, becoming a superhero. She could take normal human form, but she also had this ethereal form, the form of a goddess interacting on the mortal plain.
And more and more, with people beginning to believe in her, her powers and strength grew, to the point where she could save people from disasters, perform miracles, and also, knew when every human on the fleet was about to die. She would be able to go to them, at the moment they were to perish, and offer her warm embrace. (Assuming she allowed them to die, as sometimes she would intervene and say, "No. You could die today, but I am telling you it is not your time yet. Go live the rest of your life.")
It was a bunch of random stuff, but somehow, it blended together and actually worked to tell an interesting, fascinating narrative. That's the type of dream I love to have. (Especially since it had a female protagonist, and a mother no less. That's incredibly rare in my dreams. As in, this is the first dream I've ever had with a mother as the featured protagonist, rare.)