I know exactly what you mean about your mind not holding anything. I've been that way since the bomb was dropped on me (six months ago). I really have to focus and even then...my head leaks. I think you're right, the anger isn't helping you. My H said something to me months ago about expecting me to "blow up". My only response was "how does that help me?" I know that's a whole lot easier said than done. I use physical activity to release mine. I'm glad you have a C that can help you with it. This is a great place to vent too.
I love what your friend said. That is so true. If what you're doing already isn't working, what have you got to loose? I think you're sitting in the catbird seat right now. You H wants to make it work. That's a great place to be b/c the ball is in your court. You get to choose whether you take it and go home or not.
I do take care of myself as best I can. My sitch is precarious to say the least. I come here, I have my D's and a couple of friends to bounce things off of. Besides, any day on this side of the dirt is a good one.