[The next few hours are spent in a state of mostly-awakeness and when he does drift off it's only for a few minutes before he forces himself awake once more. Making sure she's still there. That she's okay. Breathing, and once he's made sure of that he goes back to the hunt for answers. Something to tell her when she wakes up, a way back, or just a way for her to go back to her.
But of course there's nothing, and eventually he succumbs to exhaustion.]