Lots of water, fresh fruit and vegies and if you are still having trouble take something like Metamucil. I was the same and it was awful. As for pain relief, I can't take anything with codeine in it at all so once I finished up my hospital tablets I just took panadol. How is the pain going with the panadeine? If it is easing it well and you are feeling ok maybe try just alternating with normal panadol with the panadeine and that might help as well?