Whenever I am thinking in my mind or talking with anyone or listening any conversation or TV. Some word in my mind is overlapping with the word or phrase which I am listening or thinking but I can't recognize what is that word. I know some pharses or words coming to my mind but I can't even pronounce that because I can't even recognize what is the word is exactly. When the word comes in my mind I immediately take a pen to write in a paper but immediately I will forget that or can't recognize that properly. This episode last for 2 to 5 seconds only but the frequency is once a week or once in a day or sometimes 100 times in a hour. At that time I go to sleep even in the morning for half an hour and everything will become normal. Even when I am writing this now many unnecessary words and phrases comes in my mind and disturbing what I am actually thinking to write.  If this happens when I'm reading or listening I suddenly get confused. why it is so?