Hello! I'm sorry to hear you're in this position. I, just like you, was given Co-Codamol in hospital, and fell into the trap of addiction. I understand the scariest time is that moment you know you've got to quit, but you're just so scared of the pain of withdrawals and the uncertainty of life without the drug. Things I found helpful when going cold turkey were:
Loperamide (I found this not only helps with stomach issues, it also eases the restless legs, anxiety, and hot/cold chills too. I took about 12 of them on my first day, 10 the next, and so on until I no longer needed them. Be careful not to get addicted to lope though, lope addiction is real, so make sure you are always lessening your doses)
Zopliclone (or similar) to help you sleep
Hot baths (these helped only while in the bath though, unfortunately)
Fruit and Veg (honestly, your body will thank you for it)
A favourite film (you'll probably cry all the way through but it's really cathartic)
Most important of all is to keep saying to yourself, this will pass. And when it does, the relief will be unreal! Then you can live your life free. You are suffering TEMPORARILY to be FREE to live your life on YOUR terms.
I'm a month and a half clean, and I swear to you it is worth it ?