night fear

noun2

1. •
   The fear of the night, nighttime, or darkness.

   • At night, the sounds were different, no less pitiful. Screams from nightmare and nightfear. — 2004
2. •
   A fear or terror that one typically has at night.

   • A new form of fear within me—the real night-fear of the unknown, my honest doubt as to whether we would survive. — 2014