I David, I'm jojo and I'm an addict, too (rx pills). I am on day 7 and I gotta tell ya, I didn't know if I was gonna make it, especially the first three days. It's different for everyone, I know. Days 5, 6 and 7 have gotten much better physically and a little better mentally. My body and brain are both pretty scrambled.
What helps me is reaching out to people-- this board is good, meetings are great (can you get to one in your area?), talking to people on the phone helps, etc.
I'm with you on the mental/emotional pain and anguish of having to go through this. I've been relapsing on and off for a year and, let me tell you, I can't take it anymore. For me it's life and death. But it's hard to be in so much pain... I can't use... I can't quit. Ya know? I've been brutal with myself, feeling so overwhelmed with guilt and shame. And that's the WORST thing I can do/feel right now.
Don't know if that helps... I'm there for you if you want to talk.
jojo