I thought I'd feel better by now!

Hi all, I'm 21 days sober and feeling proud of myself but there have been moments I've struggled and thought fuck it, I think because I can't honestly say I'm feeling hugely better. I though by now I would feel less tired, more motivated and productive and be losing weight. I don't eat a lot of sugary foods, am trying to keep a good sleep schedule and am forcing myself to be more productive but I definitely don't wake up feeling energised and motivated. Is this normal? I definitely want to stay sober but it's harder when I'm still not seeing major results. I used to drink a bottle of wine every night for about 3 years. I'd live to hear of other people's experiences in this regard. IWNDWYT! TIA