Two years is a while. Generally the mileage varies when it comes to drug withdrawal, depending on several factors, but I would bet if you found pleasure from it you'll experience classic opiate/oid withdrawal. Just be thankful you weren't taking more. Maybe get some immodium, some valerian, melatonin, diphenhydramine, and exercise/meditate. The worst should be over in a week. Good luck, and good choice.