In the first one or two days: Delirium tremens -- DTs. I have experienced this quite a few times with and without medical treatment. They suck. It's very uncomfortable to know that continuing to drink will kill you and this can be deadly too. It's a scary trip. That's why some call it the horrors.
I'm trying to rest in a half sleep state of nightmares and awakened terror with a rapid heart rate and hot and cold sweats. It really is trial by fire, and when you make it across the hellish ordeal you will have earned a new very fragile sobriety. The next few weeks is post acute withdrawal time, with all kinds of feelings and emotions.
It is best then to get into AA and outpatient counseling and not come out for a drink again ever, one day at a time for the rest of your life. Never forget the DTs and be grateful. Don't drink. Go to meetings. Trust God. Clean house. Help others and enjoy your life with your new tools and freedom. You are blessed to survive. You have achieved nirvana