Tā zhěngtiān huánghuáng bù'ān, bùzhī dào jiēxiàlái huì fāshēng shénme.
He was anxious and unsettled all day, not knowing what would happen next.
Tips
usage
惶惶 is often used in the phrase 人心惶惶 (rénxīn huánghuáng) — 'the public is in a state of panic/anxiety'. The reduplication intensifies the sense of unease.