I quit drinking wine 3 days ago and am exhausted and can't do Su Doku?! Serious !

I quit drinking wine 3 days ago and am exhausted and can't do Su Doku?! Serious question!?

I'm not a hardcore drinker but I am accustomed to having almost a bottle of red wine an evening, which is too much so I decided to go on the wagon. I am drinking lots of water and detox tea with lemon and cayenne and eating alkalizing food like asparagus. Does anyone know why I am sleeping so much (8 hours at night and I just took a 3 hour nap) and why I can't do 'fiendish' level Su Doku anymore? That one symptom may see odd but I normally do those relatively easily and just 3 days ago (the day after I stopped drinking), I found I could not complete one and had to go down to the 'difficult' level ones for any success. Am I releasing stored toxins that are making me lethargic and stupid?

You should be better when your body gets done detoxing.