My Thought Process And The Way I think has changed..

Why do I keep thinking about everything I think and do? Sometimes they're stupid thoughts like why do I keep turning to the left, I need to turn to the right... I socially don't like the left so is this perhaps related? I also have comments in my head like "move out of my way" or weird thoughts like I can't control? For some reason I no longer think about my ideas I only comment on what's happening in my present situation.. I also have an inablity to tune anything anyone says to me now. Every word I make sure I absorb every word that's said into my thought pattern. I often have thoughts outside of my situation but theyre no longer past or future based, or even about myself.. Sometimes I think of my particular memories in use of an example.. But never in a series of thoughts like I used to. My brain thinking has changed and I'm curious how this is a possibility???