I am sober for 4 days now.

I was drinking on and off for over 7 years now. I think I’m loosing focus of my life and my work and I was thinking of quiting it for so long but I couldnt. At some point I will start again. So I want to know how did you all stopped taking it and what changes did that make in your life..I stopped drinking for 4 days now.It’s was a great achievement for me in the sense I never thought I can be sober for 4 days but I think I’m loosing control now and my mind is constantly telling me to buy beer. Can someone give me some advise like how did they get over it.