A persistent feeling of unreality

I’m nearly 56 but as a teenager I suddenly had a shocking sense of revelation that I was completely alone and everything I was perceiving was fabricated by my mind.  I became obsessed about shaking the torment of the thought to no avail.  I was never able to fully shake that sensation of disconnection from ‘All’.  I’m not sure what all of this is about and I wonder what a more enlightened self might say that to other teenagers out there going through similar exclusions from Life as experienced.  In some sense I died to my entire past up to that point.

One attribute of the sensation was that I suddenly could no longer trust that things existed beyond the walls of a room, people I had known no longer had lives independent of my mind.

I am aware of the implications for danger to others as a logical outcome of this insane thinking.   

Is this feeling connected with Autism?