Critter Paranoia 

Paranoia involving somebody thinking they see bugs and small critters (spiders, cockroaches, flies, fleas, etc) when there is nothing there, oftentimes involving fear of the bugs or critters.

Also when somebody is always looking around them to make sure no bugs or small critters are in the area.

Person 1: *checking all around their chair*
Person 2: What are you doing?
Person 1: Oh, it's my critter paranoia, I really hate bugs.

OR

Person 1: *jumps up off the couch*
Person 2: What's wrong?!
Person 1: I thought I saw a spider crawling on my leg.
Person 2: Man, you got critter paranoia, bad.

Critter Paranoia by Larentiah September 13, 2011