When I am feeling overwhelmed I make an extra effort to focus ONLY on the things that I can control - or the things I can change (myself or my reaction to others). This requires that I am brutally honest with myself. It is a worthy exercise though. One that has helped me grow stronger - one that has helped me move forward in my life.
Obviously you are feeling overwhelmed. I would ask you to consider stepping back. What is in your control? Is there one thing that you can do today to make your life or the life of your daughter better?
If you can't think of anything, try repeating the serenity prayer and directing it specifically towards the situations that are troubling you.
Focus all your attention on changing what you can. Worrying about things you have no control over will make you as sick as the drug addict that brought you to this sight.
((feel better soon.))