So it's like any busy job, you are so involved in it, so immersed, that when you have a holiday you can't think of anything to do. And yet, the army training is horrible and boring in its own way. You haven't protected anyone, nor killed anyone. It does sound stressful on the emotions. Now, think: what would you have done if you'd been home the whole time, and not been in the army at all? Now's the time to do some of those things. Keep your mind busy.