How likely is it that i have add even though i have not been diagnosed and i am 18?

Yes: Some people have enough strengths in other areas of the learning process that they slip by without raising concerns.The inattentive type is most often overlooked.That said, there are other factors that play in young adult learning problems.An educational psychologist has the tools to help sort out these issues. One on one testing can give you a better idea of what is going on and what to to improv.