A single word meaning doubt and unsettledness

What is a single word suggesting doubt in the heart coupled with unsettledness?

One could doubt without being unsettled by an affair - I want a single word combining the two.


Solution 1:

Qualm — "an uneasy feeling of doubt, worry, or fear; a misgiving".

Solution 2:

trepidation is a possibility.

Solution 3:

How about unease or angst?