Psychological craving with codeine withdrawals

I came off a long addiction to heroin 3 years ago using neuro-electric therapy to detox and to allegedly rewire my pain centres in my brain.   However, I relapsed on codeine meds 18 months ago and I'm now struggling to go cold turkey.  Physically it's fine and theres no comparison to coming off the likes of heroin or methadone but the psychological side is still hellish as this must be about the 20th time I've gotten 2 days clean.  I need a bit of help and support to do this as I'm doing this at home and theres no-one I can confide in.  I'm also due back at work tomorrow night but i can't afford to take any more time off as I'm already facing the sack due to poor attendance.  I've got to go through with it as I feel my liver is due to pack in.
Thanks.Pat