Remember:

Setbacks happen. They're no fun at all, but they are a natural, normal part of recovery (which, by the way, is not an easy thing).

Sometimes they happen every single day for almost a week.

This does not, in any way, make you a total failure, or somehow magically undermine all the progress you made while you were in treatment -- which, again, was a lot. Of progress, that is. You made an extraordinary amount of progress in an extraordinarily short amount of time. That's not just your own opinion, either. People who have said something to the same effect, without being asked, include, but are not limited to, three different therapists, pretty much everyone who was in group with you, one person who left group before you did (good job staying in touch with her), two of your three best friends in the world, and the big sister who is not actually technically related to you.

Also.

You know how you've been working so hard to be fucking ecstatic every single day, and make at least one other person fucking ecstatic every single day? You know how you've been working so hard to take care of yourself? You know how you've been working so hard to be as awesome as you've finally seen yourself to be? (You know how you've been making it look easy, even though it's not?)

You know how you've been doing such a good job that awesome stuff just can't stop happening to you even when you aren't trying?

The fact that you've had such a crappy week IS NOT GOING TO CHANGE THAT.

P.S. I'm really proud of you for what you did yesterday. Pretty much everyone in the whole world sucks at expressing anger in a constructive way, but you proved that it's actually fairly easy. That was spiffy.