Lingering WD Symptoms?

I went cold turkey off of acetyl fent 15 days ago. For 3 or 4 days I suffered some extremely intense symptoms. Super bad sickness! I know what opi WDs feel like, this was something else, something more. My question is; Now I've got this general feeling of malaise, tiredness and a mild I'll feeling. From the time I wake until bed. Just wondering if anyone else remembers experiencing something similar. I'm trying to connect it to the WDs, which I'm ok with, knowing itll go away eventually. But if it's not the WDs then something else may be wrong. One more thing, I never felt this before quitting the fent. Thanks!