Hang in there Jay - you are doing great with day 3 sober! The cravings wont last. Get some ways to keep your mind occupied so that you don’t focus on your cravings. Browse this site - it’s been super helpful for me.
Many threads to read through here and get loads of great advise and support.
check out this thread in particular: Cravings & how to beat them, Isolation vs. Connection, H.A.L.T
Wishing you the best of luck - hope to see you around.