Altered State of Reality

I've no idea if this is an autism thing or me thing but I was curious to know if anyone else gets occasional shifts in their sense of reality.

It's hard to describe other than there are times when I seem to flick into a mindset that becomes confused as to whether everything around me is real or it's just like a matrix style simulation. It only lasts a few seconds to at most a minute - but it's disconcerting nonetheless.

An example would be driving along a road and suddenly getting the feeling that I'm not really solid, more ghost like or dreamlike and swerving into the opposite traffic would be simply like cars driving through mist. Something prevents me trying the theory out and I'm still here to mention it so I must have been real!

I used to play a lot of games a few years ago, and sometimes my mind would shift into thinking am I in that game? - eg, Fallout 4. This involves collecting scrap to make things to survive in a nuclear wasteland. I'd see those objects in real life and think to myself I could take it home as it would be useful to make something for the game. Then I'd realise my stupidity.

This is just a couple of examples. I did want to ask these questions when I was getting my diagnosis but my mind was too mushed with the news to think.

Regards

Lee