halitophobia
n.— «At the organization’s recent global conference, halitophobia—also known as delusional halitosis or imagined bad breath—was identified as a vital area for future mouth malodour research.» —“Bad breath? Forget gum, you might need a shrink” by Misty Harris Times Colonist (Victoria, British Columbia, Canada) Oct. 11, 2007. (source: Double-Tongued Dictionary)
Further reading
If you’re in a book club, how do you decide what books to read? There are lots of different ways, depending on your group’s goals. And is it ever wise to correct someone who mispronounces a word? Sometimes you have to decide if...