I too have this conflict with myself daily, and the one thing I remind myself to do is to remember to take responsibility for the things that I've done, and not feel guilty for the things I could not control.
It becomes to over whelming if you take responsibility for everything, even the things you were not responsible for. I recommend focusing on one thing at a time, and accepting the things you can not change.
I hope you feel better, don't beat yourself up.
Desirae