[johnchristopher]

I remember reading these are called parasitic(?) thoughts, uncontrollable and random thoughts, sometimes leading to more complex reasoning but ultimately almost on autopilot ; like the mind is just suggesting many different things at once and you just happen to notice one of those random thinking when it reaches the surface of your consciousness. I belive it also has to do with an anxious mind but I have nothing to back that up.

[levythe]

Since you seem to have doubt to the name you were fishing for, I've heard the term intrusive thoughts.

[johnchristopher]

Thanks, that's the term I was looking for.