how do you prove and opiate addiction?

Question by Isabele: how do you prove and opiate addiction?
I have been one heroin for 2 and a half years, I have been mainlining oxycontin for the past 3 months because I cant get ahold of heroin from my regular dealer. I am ready to quit so I called a methadone clinic to get an appointment, I have been withdrawing for 3 days now and its killing me. The clinic cant fit me in for 2 weeks. Should I not use? Its so hard, I want to so bad. But my question is, if I dont use..the drugs will be out of my system and I will have no proof, they say you must have been using a year and have evidence of opiate addiction. SHould I use so I will have evidence? What evidence do they mean?I really want to quit, but without this I will use.

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