bipolar diagnosis age

Are the doctors wrong?
First they said I had ocd as a kid, around age 15 , then the year later another doctor said depression then 6 months later another said bipolar. Are they all liars? They had one sit down with me and they made these diagnosis’s so what am i really?
It is possible that you have all 3. Depression is one extreme of bipolar or it can be a disorder in and of itself.
RN
porta- nueva generacion – trastorno bipolar (con letra)