methadone for pain

[craigyt2k]

i am currently suffering bad knee joint pain and its getting worse, i have a docs appointment in the morning for it though i am not sure i will be prescribed any decent pain killers (i have drug abuse in capitals on my medical record), its getting depressing, im ony 23 and my knees are wearing out (runs in the family)

Im thinking if it goes unbearable and im not prescribed anything to take the edge off, ibuprofen and co-codamol dont cut it. How would a methadone habit do for pain management, would it not be worth it? having a methadone habit to dull the pain?