I was diagnosed at 33, and it changed my life infinitely for the better. YMMV, and you may not have ADHD, but if you do, it is nothing to feel guilty about - it, in fact, gives you some insanely useful abilities that others simply don't have, as evidenced by the number of comments on this post explaining you have no guilt to feel, and your positive performance reviews.
But being able to understand why we do these things, and being able to understand how to adjust for them (whether through medication or coping mechanisms) is, alone, insanely relieving.
Consider picking up 'Driven to Distraction,' or 'Delivered From Distraction,' or check out these posts by Mark Suster which was what led me to get started on the path:
* https://bothsidesofthetable.com/how-to-know-if-you-have-add-...
* https://bothsidesofthetable.com/why-add-might-actually-benef...
* https://bothsidesofthetable.com/developing-an-action-plan-fo...