You're actually doing great. Your positive attitude is awesome.
I went through that fatigue as well (most people do). It lasts between 3 to 4 weeks and there isn't a magic cure. I actually had it so bad that I thought I had developed a serious health problem.
What worked for me was sugar drinks - coke. I never really drunk it prior but had 2 cans on average during the day and 2 at night helped. Other people eat sugar foods like chocolate and cake. Ultimately your body is going through a repair stage and not drinking means you have deleted a massive sugar hit (alcohol) from your diet.
Your positivity is inspiring. Thanks