Ah yes, I remember the equivalent moment for me: I was 8, and Mom asked me if I felt different after taking the pills. I told her "I don't think so?" And then 3 months went by and I noticed I wasn't getting yelled at by my teacher for not paying attention anymore, and I wasn't getting in trouble at home for "ignoring" my parents (it took them a while to realize I was genuinely forgetting things they asked me to do 5 seconds ago).
Looking back, it's wild that it took me so long to notice such a big difference. But I think that's a real testament to how helpful those treatments are: when leveraged correctly, basic behaviors that you would normally struggle with just "click" naturally.