It's only day 2 and your emotions are sure to continue to fluctuate. Don't focus on the past too much and let yourself get into the mindset that you can only go so far. Even if you don't think that it may creep its way into your subconscious mind and make things more difficult. Perhaps that's why you have this stoic and non-excited feeling right now. You are sober, you are alive and most importantly, you are fighting. Give it time and I'm sure those good feelings will be back!