If you've recently detoxed from about 20 years of opiate/opioid medication, I would hope that your counselor would have warned you of the probability that you would experience a prolonged period of depression or dysthymia. Your opiate receptors have been constantly stimulated for decades, and it's anything but unusual to experience a period of being "down" that last for months (or longer). Some people bounce back after a period of adjustment, while others find that they need some level of safe, doctor-prescribed opioid medication to stay safe (not seek street drugs or relapse) and to be functional. You can talk to your doctor about a medication other than methadone, such as Suboxone, that will allow you to be on a long-term low "blocking" dose of medication without having to go to a methadone clinic.
Methadone clinics can, and should, test and monitor their clients for the use and abuse of other drugs.

