Jade sorry that you're feeling shitty. Can I ask in what way? Is it to do with withdrawals or just genuine? You may have some psychological withdrawal such as low mood, cravings etc. i didn't want to mention it during the acute phase encase it brought some placebo affects ( sometimes when a person is told they will feel low mood they will look out for that much that they convince them self that, that is how they are feeling). So I didn 't want you having to experience anymore s*** than you need to. If you are feeling down it will pass.
I was going to post something quite similar. After eleven days without taking any codeine you shouldn't really be getting any physical withdrawal symptoms, Jade. The physical stage of codeine withdrawal usually lasts 3-5 days, maybe another day or two in extreme cases. Insomnia may last longer and moods and emotions can also take a while to readjust, psychological stuff like cravings can also linger longer, but the physical aspect doesn't. It might be worth seeing a GP just to see if you've maybe got a touch of the flu or something like that which just happens to have coincided with your withdrawal.
If it's more the mental and emotional side of things that's bothering you then rest assured that will pass in time. How much time I couldn't say as it varies but it shouldn't be
too long - hang in there and stick with the warm baths and bananas and the like and it will improve. You tend to hear a lot more about the physical aspects of withdrawal but those are relatively brief. The half-life of codeine is only three hours so it's out the body quick even if you take very high doses and the body recovers pretty quickly from it. The psychological aspects tend to be the ones that get people down because at times it can seem like it will never end. It absolutely does end and every day you go without taking codeine (or any other opioids) is a day closer to feeling better.
It's usually when you look back and compare how you feel to how you felt a week before that you can see that actually you are making good progress and it's not as bad as it was back then you notice the improvements. You may not feel great today but I bet you felt a lot worse this time last week. A week from now you'll look back and see how much better you feel then than you do now. It can be really hard to notice the changes at the time but they are taking place - body, mind and soul are healing themselves. Just gotta hang on in there and let it do its thing.
Stick with it - doing great so far
Oh, and I also second the notion of doing fun stuff. Whatever it is that you like doing, do it. Exercise is often highly recommended as it releases lotsa nice brain chems as well as the more obvious benefits (not that I'd know from experience of course
). Laughing I do know about though cos I do a lot of that even just sat around by myself (I mean from watching comedy or something not literally just sat laughing at nothing as that would be a bit odd even for me
). Oh, and I can confirm chocolate tends to lift the spirits too (also goes some way to explaining my *ahem* cuddliness
).
They're not actually serotonin but they do affect serotonin levels. Basically they recycle the existing serotonin allowing it to build up in the brain rather than being used so quickly.
(apologies to chemistry bods far mangling that explanation)
They say they refuse accounts using gmail and postmaster.co.uk email addresses "due to abuse". I don't know what problem they've had, but it seems odd to ban gmail accounts. Loads of people have gmail accounts. I've never heard of postmaster.co.uk. At a guess, because it's easy to get gmail accounts, "trolls might use them" or something? Anyway, I am not giving them my main personal email address, because I try to keep that separate for anti-spam and privacy reasons. I happen to have another three email addresses (mail.com, live.com and safemail) and they wouldn't accept them either 
