Ocd or add?

My entire life I was diagnosed Adhd I remember being in preschool and complaining of "my thinks are going to fast" and just doing odd little things and quite recently I was diagnosed ocd even though I have been in counseling for depression for close to two years and on medicine dor adhd off and on for years (never helped wonder why???) I was wondering if anyone else has been misdiagnosed before. The doctors weren't oh she cant sit still for long must had adhd! It was many tests and still mis diagnosed.