If you seem to be annoyed and irritable a lot of the time, know that there is a connection between depression and irritability.
A 2013 article in the JAMA (Journal of the American Medical Association) Psychiatry online begins:
“Although symptoms of irritability or anger are not central to the diagnosis of unipolar major depressive episodes (MDEs), these symptoms have been found, in cross-sectional studies, to be highly prevalent and associated with increased comorbidity and depressive illness burden.”
An article in a different online newsletter is entitled Irritable Depression: When Sadness Feels Like Anger.