The test has to be for methadone.
Unlimited time, they can put it in your record not say anything and set you up to go out and use again thinking you got away with it. Usually they'll call or show up with another test. 2x is usually a ticket to the county.
They'll show up at your door with another urine cup. If it's hot. Put on some extra socks and underwear, cause your probably going to the county. Their job is to baby sit you. Don't give them a reason.
No.....Wellbutrin may help with the cravings after detox.
Addiction is usually seen when you do something despite negative consequences. Take a look at how it's affecting time with your family, exercise, eating habits, relationships, and the content of what your looking at.