Both are actually somatoform disorders. Hypochondriasis is a preoccupation with fears about a real physical problem where the severity of the illness is misconceived. The preoccupation will persist...
Hashimoto's thyroiditis
Hypochondriasis - or it could in plain be health anxiety!
You can not get a disorder.you have to be born with it.
it is an anxiety disorder
Symptoms of Anxiety Disorders
Treatment for Generalized Anxiety Disorder
Anxiety Disorders Versus Stress
Defining Anxiety Disorders