i wouldn't go the route of taking METHADONE to relieve OC withdrawal..if possible, if i was in your shoes, i would get a weaker OPIATE like VICODEN or even some DARVOCET, and take a few tablets/day to kill the withdrawal..the METh route just seems like a bad idea..
the EXHAUSTION from OC withdrawal is a bitch..
good luck kicking the habit...from most that i know who have kicked the OC habit, they had to go to the hospital, as the withdrawal was just too bad!!they had BENZOs, but still couldnt stand the pain...
i have read that the amino acid L-TYROSINE and shitloads of B vitamins helps alot with the tiredness and body aches that accompanies withdrawal...may want to give it a try??