90 days is a common turning point, but it doesn't stop there. Yes, methadone can take a long time to recover from. I was on twice as much as you and it took me 10 months to feel good. It is rough, but totally worth it. Hang in there. Are you taking vitamins and getting enough electrolytes and amino acids? That really helps. What are your other symptoms, maybe we can help with supplements to get you through.