ADD is just old terminology. You have ADHD, and you should read up on some updated science cause you got some very weird, very wrong ideas about your own condition.
[...] 15 The clinical presentation of ADHD can be described as primarily inattentive, primarily hyperactive-impulsive, or combined,
depending on the nature of their symptoms (American Psychiat-ric Association, 2013). [...]
I assume ADD is nowadays just a shorthand for the primarily inattentive presentation.