Just to let you know...
There are only 2 drugs classified as physically addictive, benzo diazapan and alcohol.
Physically addictive by definition means that you can actually die from the withdrawal. Believe it or not drugs like cocaine and heroin are not physically addictive. People do not typically die in withdrawal from these drugs ,they just wish they would.
Speaking from personal experience I would strongly advise that you seek professional help to do this. Do not take this lightly it is far more serious than you know .
Good luck my friend
I do not envy your situation