Hi Apple
Welcome. I’m just 4 weeks now codeine free. As skiddy has said it is tough at the beginning. For me the 1st 2 weeks where bad then I started to gradually feel better. I would also second the advice to take time off work and other commitments. I was just barely function in the first 2 weeks. So not having any responsibilities really helped. My gp told me to get out in the air for short walks and although it was the last thing I wanted to do, it really did help.
Be kind and patient with yourself. You can and will get through it. We are here if you need us