porta-pottyphobia

A deep and visceral fear of porta-potties.

She found herself standing, drenched in a cold sweat, before a stinking pale blue porta-potty when she realized that her porta-pottyphobia had kicked in and caused her to feel that her feet were planted deeply into the earth so that she could not move them forward or backward; also her teeth were clacking together involuntarily as vomit filled her throat and she had a sudden, fleeting image of the terrible childhood incident that caused all of this to immobilize her so completely.