Hi Jodie,
You've come to the right place for peace of mind and clarity.
I would say the first thing is to breathe deeply (in fresh air)....cliche for sure, but oh so true. Sometimes as we look at the problems, we seem to forgot our own sense of self.
Maybe set a timer and put on some fun music...probably more cliches. But it really helps to have a time limit on how much cleaning/sorting/misery we have to do at a time. Especially in what seems a "never-ending" task.
It's wonderful that she's seeing a counselor...I'm hoping you are too. I'm learning that sometimes, maybe even often, when we're dealing with someone with a mental illness and/or addictions, we need help, too.
I wonder if you could enlist a friend to help during this intense cleanup phase? It's very hard to find someone who isn't swamped with their own lives, yet maybe there is someone who could spend some time at your home with you and your daughter?
Keep coming back to this message board for inspiration....and don't forget to take care of yourself in this process. (And yet another cliche...that is VERY important!)
Warm thoughts to you and your family.