Get yourself a copy of Susan Anderson's "A Journey from Abandonment to Hope." It will explain what's going on with you physically and why you are cycling from pain to strength to despair.
You're still in the very early process here. Your sense of self has been shattered. It's like a death that keeps happening over and over and yet it's worse than death. When someone dies everyone comes over to comfort you. When someone leaves -- well, people say things like 'get over it.'
You are also probably going through withdrawel. Even if you weren't really happy, he was there. It was familiar. It was comfortable.
Find the book and read it. It really helped me.
Me: 47, Ds 17-13, D final 6-11 http://tinyurl.com/yk4e2tz http://tiny.cc/thread2 http://tinyurl.com/ydtphqu http://tinyurl.com/thread4 http://tinyurl.com/3sm78k6 http://tinyurl.com/thread6