Is it normal that i can barely control my thoughts and focus?

My mind produces seemingly random thoughts and ideas at a pace that i can't even keep up with. it makes me feel stupid at times because it will cause me to either become confused with remedial tasks, or cause me to really space out at bad times. sometimes it will become so overwhelming that ill become very distant even in a group of people. im sure you can see it in my face. the thing is, i feel like i actually have alot of brain power, but i can't harness it because it preoccupies itself with nonsense in what seems like a constant attempt to keep itself busy or something. there are times however where out of nowere i will suddeny understand something that seems extrememly complex. Does anybody else feel like this?