What's up with my brain?

for some reason all this random stuff randomly pops into my head at random times, peoples names and things that i dont even know who they are then i have to google the thing ive thought of to find out what it is. like for example i was vacuuming the living room and thought the great gatsby. dont know why, didnt even know what it was, then i had to find out. if i dont know what it is why is it in my brain? theres been to connection with it. it happens all the time and i dont know why.