Sorry to hear, you´re having such troubles. I had sort of a crisis last year when I turned 40 (in fact, I´m not quite out of it yet) and tried it with yoga first to just, well, calm down. But in the end I went to a psychologist for therapy and he helped me a great deal to put things into perspective and to question my actions and thought patterns. It changed quite a bit in my life, more actually than what I bargained for
But I´d definitely recommend getting professional help to anyone who thinks they´re at their wit´s end. And sometimes it already helps to see you´re not alone with your problem.
EDIT: I just realised, this wasn´t really answering your question, but maybe it´s helpful anyway