Congrats on 12 days!
1.) I noticed that I would react a lot more strongly to nicotine while I was drunk. But, I hadn't noticed such an effect with caffeine, either when drunk or sober.
2.) Caffeine is sort of hit-or-miss with me. Sometimes it helps fix sleepiness, sometimes not. Sometimes my anxiety is relatively fine while drinking coffee, sometimes I end up with heightened anxiety or even a full-blown (for me, anyway) attack.