Welcome to healthcare Magic!
Really feel very sorry for all the suffering that you had to underwent and I am happy that they could save your life.
patch is a very good pain control medicine which can control pain for 3-5 days with one patch.
if your wounds have healed and you do not feel pain then you should cut down the dose by half and after a week you can stop the pain patch.
I hope the advise would be informative and useful for you.