When thinking about adult ADHD, keep in mind that it has to be a condition that has been with you since childhood (if the
symptoms have come on suddenly, then it is not likely to be
ADHD), and a general rule of thumb is that adults with ADHD have symptoms significant enough to interfere with their being able to achieve in accordance to their intellectual potential. Your situation is frustrating and confusing I am sure, but the symptoms you describe may not be ADHD.