Which one should one seek for extreme health anxiety? psychiatrists or psychologists? seem the same to me but would like to know which better suited.

As a psychologist...: I'd start there - ideally you'll find a psychologist with a special interest in "health" concerns. Psychologists often can spend a longer time with a new patient and in their diagnostic process, if they believe a medication will help, they'll refer you for that. Learning strategies to self-manage anxiety can be useful in many ways + no negative side effects! shop around for a good fit. Best!

A Clinical Psychologist is a Doctor of Psychology, a PhD. Please see a Clinical Psychologist with expertise in multiple types of psychotherapy to help you with your Hypochondriasis issues and a Psychiatrist if you need medication.