Terrific responses here. I could only add to the mix by recommending you read the book, “Driven to Distraction.” You’ll know by the time you get to page 50. I got diagnosed but that didn’t matter to me. It was a formality. As I read this book I immediately knew. It was as if the author had interviewed me and written a book about my life. The book also defines the so many different ADHD types. Very helpful. All your answers begin with this book. Prepare yourself because your questions will never end.
P.S. In regards to you brain dump symptoms… All are characteristic of ADHD.