Suggest Ways To Wean Off Methadone

hi how long does it take to feel better ? I got 4days of methadone stopped on 3 mls I was only on 45 mls n people say it takes 10 days but I was on it for 4 years and I came down by 3mls every 2 weeks,just hate feeling week I feel like a walking dead can t help with much got chills,just need a idea how much longer will I feel like this?