How Long Does Methadone Take To Be Completely Out Of The System?

I've been on methadone for a year. I decided to get off of methadon so I started detoxing a mg a week. I'm down to 2mg.and find myself dragging,sometimes i'm real short with people. I take B12 to try to give you motivation.it's in the mornings when I am dragging. At nightime I take mirtazipine 45mg,and quetiapine 300 mg.ans a vitamelt sleep pill. I sleep good,but it's when I wake up.what can I take plus how long will the methadone be In my system. When will I feel "normal"