Yep! I was diagnosed seven months after getting sober. It retrospect, I see a huge connection. I used alcohol as a medication, calming my mind and helping me deal with stress and transitions (my nemesis! Transitions are really tough on me, distracting and drive me to seek comfort). Since I am sober, it's been much easier to deal with my ADHD, learn better skills, etc.
Question: are you still drinking? It really is easier to deal with ADHD characteristics when sober. My life has improved dramatically, in ways I didn't even imagine. Are you receiving any treatment for ADHD?