Congrats on Day 7 DD931. Anxiety and up and down emotions are very common during the early stages, so hang in there - it will get better!
I lost a pretty significant amount of weight after I quit - it took several months but it was enough to make me look and feel a lot better. Part of it was because I wasn't drinking so much anymore, but also because I ate very poorly when I drank too - lots of junk food, late night snacking, missing meals etc. In addition to quitting the beer, I also started eating better and also getting some moderate exercise. Even just taking a walk can really help.