As an American (we've been brought up now a number of times in this thread) Lizzie, I encourage you to check out these threads;
ADHD/ADD and http://www.healthyplace.com/adhd/parent-advocate/dyslexia-what-is-it/menu-id-916/
I not trying to insult you by posting these. My brother is dyslexic & I myself am ADHD along with my older brother, my nephew, my mother & my son. These disorders are also often known to be umbrellas that other disorders seek shelter under & sometimes seldom are ever realized. We are also sometimes known to be very "superfocused" when otherwised scattered.

Good luck

Barry