hypochondria

noun2

1. •
   A formerly defined psychological disorder characterized by excessive preoccupation or worry about having a serious illness. No longer a current medical diagnosis; see hypochondriasis for more.

   • In this category we must include, for example, hypochondria, a disturbance shown by undue anxiety concerning one's own physical and mental condition. — 1908
2. •
   (no longer used) Melancholy; depression.

   • Such labours as these, if they do not shorten life, are calculated to make it wretched, for hypochondria invariably follows close upon them. — 1833