time is pain but with you it's gone

Luna is an average girl but what will happen if she went back in time to fix her past then comes back and she is in the most unbridled pain she starts with the pain then she slowly losing sanity and her past come back and she no longer shows emotions until one day she meet someone who will change her or will she be cold to him what will happen when half of the humanity died's because of her women and children mostly because of a virus that can't be cured