Bigbird...
Right now, you're so concerned about how she feels and how she's going to react... but the thing is, you should be concerned about how YOU'RE feeling and how YOU'RE reacting to all this.
She'll be fine. I don't mean that in a mean way... but it's true. She'll find her way to get better. Got to focus on you... because if you don't, come 2 - 3 weeks from now, she'll slowly feel better and you'll still be stuck in that rut.
I know that you said you two are taking a break... fine. You guys aren't officially broken up... but you have to treat this as if you two have broken up if you're going to make anything better.
If you work on yourself:
If you two get back together, then you'll be THAT much better as a person if you work on yourself for now... if you two DON'T get back together, then you'll be more focused and better at "getting over her"
If you DON'T work on yourself:
If you two get back together, same problems will exist (if you two had problems). If you two don't get back together, this past week or so will seem like a waste, and you'll take much longer getting over her.
... hope that made sense.