Do I have A.D.D??

My grades have been going down & I told my brother about how its hard for me to concentrate in school unless I wanna do it and he thinks I could possibly have A.D.D and maybe got it from my Dad’s side of the family since my brother has it. I looked it up and I had all these symptoms it listed:

* Be easily distracted, miss details, forget things, and frequently switch from one activity to another
* Have difficulty focusing on one thing
* Become bored with a task after only a few minutes, unless they are doing something enjoyable
* Have difficulty focusing attention on organizing and completing a task or learning something new
* Have trouble completing or turning in homework assignments, often losing things (e.g., pencils, toys, assignments) needed to complete tasks or activities
* Not seem to listen when spoken to
* Daydream, become easily confused, and move slowly
* Have difficulty processing information as quickly and accurately as others
* Struggle to follow instructions. (SomeTimes)

But then I started listing symptoms that have to do with hyper-activeness like:

* Fidget and squirm in their seats
* Talk nonstop
* Dash around, touching or playing with anything and everything in sight
* Have trouble sitting still during dinner, school, and story time
* Be constantly in motion
* Have difficulty doing quiet tasks or activities.

Can you have A.D.D and not be soo hyper-active? Could I possibly have it?? (I’m 14 and I’ve first noticed not being able to concentrate when I was about 12. If you need more details or what not then just ask me.) Thanks!