Most adults with ADHD go their entire lives without a diagnosis. They develop coping mechanisms without realizing that's what they are. Anxiety and depression are both comorbid with ADHD (meaning they pair up rather frequently). If you think you might have ADHD there's a really good talk by Dr.Barkley on YouTube. He's one of the leading experts in the field and he goes over common problems and coping mechanisms. The video is called Essential Ideas for Parents. If you resonate even a little bit with it I highly recommend seeking a proper diagnosis