Queasy
Part of speech: adjective
Definition: experiencing or causing nausea or uneasiness, often characterized by an unsettled stomach easily troubled; squeamish
Nervous
Part of speech: adjective
Definition: Easily agitated or alarmed.Apprehensive or anxious.Relating to or affecting the nerves.
Example sentence: There is no fixed physical reality, no single perception of the world, just numerous ways of interpreting world views as dictated by one's nervous system and the specific environment of our planetary existence.