4 days is so early. Once the fog lifts you might find that what you thought you had isn't what it really is.
I'm over 5 months sober and, no, I'm not happy but I realize that one of the reasons is that I drank in place of dealing with my issues - now it's going to take me longer to dig out of this situation I'm in because I ignored my problems by drinking them away. I do realize now that I'd be no happier if I drank - I would just be numb and drunk - still not happy.
Hang in there - it takes time - you're doing great