Clinical psychologists are not doctors, they are psychologists who are focussed more on treating people than research.
I'm not sure what you mean by "doctor psychologist". If you mean a doctor who deals with mental health, that is a psychiatrist. If you are talking about a psychologist who treats people, that is a clinical psychologist.
As far as I am aware you don't need to take either.
Edit: why the hell was I negged? If you think I am inaccurate, please let me know.