(((((((Muffy)))))) It's your big, warm heart that sounds like like encouraged you to bite off more than you can chew. You never know how things are going to turn out. You still don't know how taking that girl in might affect her far down the road. Such things are never pain free, they demand a lot from you and others as well. And that is just how it is.
Talk, as much as you need to, cry as long as it helps, and take some time to pull back and reorient yourself. You have so much on your plate, muffy.I'm amazed you still have all that room left in your heart that you do. Many, many hugs