It should be almost over. Make sure you retain enough fluids. You don’t want to get dehydrated. There are drinks in the market like propel that can help with electrolytes. Good luck.
I am not familiar with OTC codeine, but Clare says it should be almost over, so that rocks.
keep it up, and if you can't eat, drink ensure plus, and take vitamins.
keep posting, and congrats on quitting and taking your life back,