I go to a pain clinic. My doctor gave me nucynta tablets. I go back to the clinic in 12 days.I recently took a total of 50mg of methadone. The nucynta dont help my back pain at all. My friend had methadone 10mg tablets and I took them orally. Should I be worried? I took a total of 50mg. How long will this stay in my system? They might drug test me when I go back to the clinic in 12 days.I weigh right at 200lbs.and work out regularly