Did I just waste my life?

Hi, I am not sure if I am the only one who have this thought, but in my early 20s, I felt i was suffering from the inattention and lack of confidence and went online to self diagnose myself and I figured out it could be ADHD, but never took a serious action to tackle that and carried on with my life, mess in ny career, my relationship and with my friends. Now in my mid 30s that I see a doctor and take meds, which made my life just feels NORMAL for the first time, this nasty feeling of regret struck me that I just wasted my life. I just felt I need to share this with you.