I would call and check in with your T, make sure you're appointment for next week is set and you'll see her then, etc.? That might make you feel better, "doing" something like that.

Think of something to do at work that will distract you for a bit, a complicated piece of work/project or make yourself a "procedures" manual or some other piece of busywork that will at least organize you more. You might feel differently by the time lunch is over and there's only 4 more hours or so to work. Just get some time to pass.