In before it turns out that he's going to die, or at least seem dead, soon, and the counter counts the days before she commits suicide because of their relationship.
Everyone, calm down. Maybe it’s just something “trivial” but at the same time a thing that for her meant a lot...maybe she stayed up almost all night too + she was nervous for the date and that combined stress (considering how much she likes him = she really wants the date to be good) is what she made overext herself...