I have A.D.D. But is it possible 2 develop Dyslexia latter in life? Cuz im coming across many situations where I read numbers backwards. Age 22.

Quite possible. Learning disability to include dyslexia is not uncommon in the setting of ADHD / ADD, usually exists as a co-morbidity. To prevent impairment of function at school / work do have a proper psycho-educational evaluation to confirm adequate contol of ADD and for needed resources if a LD is confirmed.