I'm also sorry for the wait that you had, and that the meds aren't really helping. I haven't taken a codeine in decades, as they just hurt my stomach, and make me dizzy. I can, oddly, take stronger meds better, though I don't take whole ones.
If yours hurt your stomach, maybe try to eat something as a buffer first. Something with bread, perhaps?
Feel better soon! (((Hug!)))
Love All Life; Thank You For Posting! :)