Jaina had tried to sleep, but it wasn't really happening this week. That would happen when you started off a zombie invasion by finding out that your boyfriend was dead, and that meant she dealt with it the only way she knew how: by absolutely not dealing with it. She'd actively avoided radio after the first night, she cut short any efforts to actually talk about it, she went out and killing as many zombies as she could, because she could not crack during a crisis. She'd save the breakdown for after.
After going to negotiate with the gremlins, though, she actually had some hope that things might not actually end as badly as she thought, but she still wasn't getting her hopes up. She didn't really have it in her to do that.
Not that it stopped her from going upstairs when she'd given up sleep, opening the door she knew was always unlocked, and crawling into the bed. She would still only fall asleep when she was exhausted enough to do so and it didn't make her feel any better, but it was where she wanted to be right now.
[Establishy, room modded with permission. My roommate's shower is preventing me from my nightly routine and I refuse to sleep in my contacts again, so I post while I wait. Will totes be a linkdrop.]