Glad to hear she is doing OK!
I think you were smart to keep dosing her on the meds. If you can "stay ahead of the pain" I think she will be far more comfortable. Once the meds wear off and she is complaining of pain you are kind of heading down a slippery slope! Make sure she is staying hydrated, even if she doesn't want anything to drink. That codeine can make her constipated (I know, more info than you wanted) so lots of liquids can help with that!