Imposter Syndrome

I have just recently been diagnosed with inattentive ADHD, and my family didn't seem to pay a lot of attention to the diagnosis. They seem quite apprehensive. In fact, the doctor in my family said that "I don't have ADHD, I just have some learning problems and learn slower"

Anyway, I don't feel imposter syndrome because of them, but because I just feel like everyone (without ADHD) has my symptoms and that maybe I didn't answer the most correct accurate way possible to the questionnaire.

Anyway these are the symptoms which made me think I have ADHD in the first place : - Frequently falls asleep when doing boring or difficult tasks/homework which requires a lot of concentration, or which is simply uninteresting (even though not tired, and no sleep issues) - Attention span of a Goldfish, around 5-10 minutes max before having to take a break or do something else and get distracted - Used to forget and misplace many things as a child, but has developed behaviours and mechanisms to prevent it in adult life - Used to get a lot of remarks in my school diary from teachers and even school staff about bad behaviour, being too talkative, forgetfulness, day dreaming, and very average marks - Used to get great marks in subjects which really interested me, and got below average marks in subjects which didn't interest me as a child - Makes silly mistakes during tests, even though knows the matter well and has practiced enough - Constant procrastination as an adult due to difficulty of task/homework - Gets easily distracted by people walking by or external stimuli, and takes a little bit to regain focus - Always fidgeting with something, or moving a leg - Known as a distractive element in a group study session or a group project, constantly changing the topic and not focusing on the work - Indulges in activities which provide quick and easy dopamine (ex : endless scrolling, pleasuring, snacking)

Please let me know if I'm just overreacting, and indeed these behaviours as a child and as an adult are not usual for 'normal" people.

Or maybe I'm just brainrot, and I can work on my attention span issues?