I'm sorry you're so disheartened.
I understand about silent split-seconds being so dangerous. I used to always feel that way. I slip back into it sometimes, but can usually manage to pull myself out in a few days or so. Here's some things that helped me cope with the silence--
I always keep a word, or phrase in my head. I tap it out with my toes or fingers. When ever there is a silent moment, it ends up being taken up mostly with the word I'm tapping out. Any word, my brain usually chooses it's own, I just make sure it's not a negative word.
If I still can't pull out of the silent moments,