Malaise

[Sarah]

An indefinite feeling of uneasiness, or of being sick or
ill at ease.

[Rihanna]

A sense of dread, discomfort or unease about the future. Whether it be self-illness, or some other personal, possibly catastrophic event.

[Julian]

maneisadn with mayo and ketchup duh

[Justin Bieber]

A general feeling of [discomfort] or [fatigue], often due to [sickness].