Feeling of unceainty and excessive sense of responsibility is seen in:
Generalized anxiety disorder
OCD
Phobia
Personality disorder
The cognitive theory of OCD says that the typical abnormalities in OCD include, "excessive or inflated sense of responsibility", "feeling of unceainty" and "overestimation of threat". Few books are giving the answers as "generalized anxiety disorder" which is incorrect.
Neurotic, Stress Related and Somatoform Disorders