People who quit drinking: How long did it take you to regain your physical health?

I've been off it for closing in on there weeks, but I feel like absolute shit. I'm tired all the time, I'm nauseous, I feel weak and old beyond my years. There's no doubt alcohol has really beaten the crap out of me during my long drinking career, but I'm wondering how long it'll take to start feeling like myself again, or of I ever will.

Thanks.