AF now im exhausted by afternoon - is this normal?

I'm day 15 AF after drinking everyday for 5 years, I drank about 350mls of scotch a night. I would normally pass out at about 10:30, wake constantly during the night and often wake up really early 4-5am and not be able to get back to sleep.

Now I go to sleep at about 10, wake up at about 6, have a good 8 hours, i do wake up 2-3 times during the night though, but i get back to sleep quickly. Now After a day of work (desk job) i'm absolutely exhausted. I come home and often i go to sleep early (9pm sometimes).

I'm exhausted right now as i write this, thing is, i normally would get 6 hours or less of crappy sleep when i was drinking and wouldn't feel this tired. Is this a normal thing that happens when you stop drinking?

So im wondering if anyone has gone through the same? is this tiredness normal? Is it a result of me stopping drinking? will it get better?

Thanks!