Is it possible that i have dislexia/add/adhd?

Hard to say: Such diagnoses require a significant review of history, level of function, exam and a variety of tests. Alternative medical, emotional and behavioral conditions can mimic these conditions. Consult your pcp to start the process.

Yes: You should have an evaluation. Start with your primary care doctor to rule out medical problems causing your symptoms. Have a neuropsychological assessment which should lead you toward appropriate management.