Maybe you're just autistic
I experience what I think of as multiple thoughts at once(it's not ADD, I'm in the 95th percentile for concentration).
I'm usually focused on one thought to begin with. Then more and more thoughts are added to my mind, but they are all still very distinct. However, what often happens is that my focus is divided among the different thoughts and abandons old thoughts for new ones. I tend to lose focus of the my first thought and keep on adding more thoughts. For instance, when I take a test at school, I am thinking about the question and how to answer it. Then I remember that I forgot to do something at home. Then I'm thinking about how I should be focusing on the test. Then I'm thinking about whether or not the school lunch is going to be shit today. All of these thoughts are occurring simultaneously. As I start thinking about how I should adopt another cat from the pound, I lose focus on how to answer the question on the test. As I start thinking about how much candy I can buy, I start losing track of whatever I forgot to do at home. At this point I am thinking about focusing on the test, how the school lunch is going to turn out, adopting a cat, and how much candy I can buy. As I start thinking about how taking over the world I lose the thought that is viciously fighting to be heard, the thought about focusing on the test. After that I'm in a continuous thought cycle until something from the outside world snaps me out of it.
Often times this is what causes me to zone out for minutes or even hours. Sometimes I am able to stop the cycling of thoughts but that requires me to focus more on a thought about not getting sidetracked.
Sometimes I also don't cycle but end up keeping on adding more thoughts and having less and less focus on each thought until I lose all of the thoughts and am left wondering where the fuck I am.
For example, as I was writing this I was thinking of what the lyrics of this song meant, the test that I zoned out on in Gov, and the thread of course. That's not too major though. It didn't cycle until I started thinking about how I was thinking about all of that at the same time and how that was a perfect example. But at that point I begin a new thought about not letting my thoughts wander.
Basically speaking, there are three ways to go with this weird thought processor thingy, all of which I explained. I either cycle, lose all of the thoughts over time, or have a thought restricting thought wandering but decreasing efficiency. I could theoretically focus on only two things at a time, one being my main focus and the other being about focusing on my main focus. I don't think I'll ever get it down to one thought in an extended amount of time as my thoughts naturally lean towards being multiple and separate.
Does anybody else have this problem?