After give/take a month of wringing my hands over whatever you want to call my issues, I finally brought it up with my mother. We had an hour-or-so-long, calm discussion about it and I certainly feel better.
I don't know how much this will help in the long run, but as they say step one is admitting you have a problem and admitting that to pretty much the closest person in my life right now is a pretty big step. She was supportive and we brainstormed a bit and hopefully I can start getting out of this rut now.