The reality show: Schizophrenics used to see demons and spirits (2013) 12 years ago
I've been experiencing the same thing (on and off) since my early 20s, but very acutely since finishing my PhD at age 30.
For me, it seems to be something like psychotic depression with dissociative features. But I have no formal diagnosis, mainly because I am distrustful of the psychiatric community. I have no idea what to do.
Anyhow, thanks for sharing your story.