You aren’t crazy at all! I have had straight A’s too all along my school years and I am now holding a steady corporate career and I believe with some success… I am also diagnosed with ADHD but unmedicated.
Sometimes you can be clever kid and have ADHD at the same time. Having ADHD doesn’t always mean having a hard time with grades but it is more of an internal turmoil.
Tips would be from me choose a path that will suit your ADHD mind, where you are not in a routine or bored, where you are often challenged and stimulayed cerebralwise! Most important, embrace your creativity and your ability to adapt to different topics very quickly!
You are on the good path!