Someone said i was using methadone for a fix that a dr. has the rite to cut me off because of that?

.the fact remains that i am a herion addict and that if my doctor cut me off i would go straight to the closest heroin dealer and get the biggest ball of black tar and jam a needle in my neck as fast as i could. i take the methadone so that i dont go through withdrawl and i stay away from the tar. i know that i couldnt kick or last 8-10 weaks of withdrawl without being locked in a cell period. so why would the medicle wourld want another junkie out there chaising the draggon? i do ok on methadone and stay away from the ame why ruin it now please help me find a way to contiue the mainteance that ive been on for moor than a year.