It's been 10 years, but if I remember correctly I had it bad for 3 weeks during acute phase. Then it returned at 4 months (or month 0, since i had a setback), 8 months and 12 months, each time lasting somewhere close to a month. In between I had milder symptoms or windows. Some people get progressively better month after month, others yoyo back and forth, no two people can expect a mirrored recovery schedule. Since you acknowledged this, then you know that if it is 100% from withdrawl you will recover.
One thing to keep to keep in mind is that it is always best to rule out any other potential health issues. Get tested for vitamin defiencies, CBC, etc just to rule any other possibilities. If you have no underlying maladies or deficiencies then you can be assured this will get better with time.