Everything you described seems very typical of very early recovery. 1 week is nothing. I did gain about 8 lbs and was extremely lazy and unmotivated in my first few weeks. I also slept a lot. Being sober needs to be your #1 goal so don't pressure yourself on other things. (Don't totally binge on junk but I did buy a LOT of chocolate.)
At about the month mark I started feeling better, exercising more, and started to get strict with myself about junk food. I have lost 5 pounds. I try to exercise in the evenings which is when cravings come on but if I need to just curl in a ball, watch TV, and not drink I do that. Sobriety first.
Don't let your AV try to make you think that drinking is in any way better for your body because you know that is BS.