Queasiness

A feeling elicited by nausea (sick to one’s stomach). Queasiness can also refer to the uneasiness, nervous, or worried feeling caused by concern over something.

Reference:
Colwart, A. (2019, December 17). Feeling nauseous but not throwing up. https://blog.ochsner.org/articles/feeling-nauseous-but-not-throwing-up