God, I hope she's OK. I'm so worried about her health and how she isn't taking it seriously herself. D: I think the King would have a legit heart-attack if she went into a coma. Maybe it'd finally wake him up to himself that he clearly cares about her more than he thinks he does. But I wish she didn't have to get harmed for him to see that.
In regards to the letter, maybe her father is actually surrendering so she can return home? And that's why she's so shocked. She can't save the King (and the future), if she goes home.
Anyway, thanks for the upload!