This might not be relevant for you, but generally, such constellations of symptoms should at least trigger a differential diagnosis between anxiety and ADHD. Anxiety can be simplified as "energy mobilized to handle important challenges." Some people with high baseline activation are really focused on managing challenges, whether external or internal. This could resemble ADHD if the person is not avoiding their feelings but instead enduring them. This would explain both tiredness and low benefit from stimulants, scatterbrain, and high energy/activity levels. People usually think that anxiety just causes someone to sit in a corner and be anxious, but many people channel the energy into action and don’t even realize they are doing it due to an extremely high baseline activation of the nervous system. For these people, it’s almost more physiological than psychological. If the activation is always directed at managing and handling something, as opposed to reflexively focusing on the most interesting thing, I would suspect it’s more in the realm of anxiety, or perhaps better described as a really reactive, hair-trigger nervous system. Not saying that it is anxiety, but it might just be that you are the opposite of apathetic.