Depression.

I am not depressed. Let me make that perfectly clear. But I have been depressed, and I have had these feelings. This woman captured what it feels like perfectly. It really is like a sneeze.

http://www.everydayhealth.com/columns/therese-borchard-sanity-break/what-suicidal-depression-feels-like/?xid=aol_eh-emo_9_20140901_&aolcat=HLT&icid=maing-grid7|main5|dl12|sec1_lnk3%26pLid%3D525433