my doc just recently changed me off 100mg fentanyl after being on it more than 3yrs and not working anymore. he perscribed me oxy 80. I still have perc 10/325 4 times a day for break through pain. I took oxy 80 after time to change patch and was worse off then before and by 10 hrs later having bad w/d. do i need to give it more time? any help would be grateful.