m so confused today, can't understand any thing.

under the swear depression and tension and a continuous headaches and  cant find any reason except I am neither listening nor talking to my younger bro. 
it is cos during his studies instead of listening to me carefully he was just repeating the same question
and when I was trying to answer him from the basics he just said that (without listening to my complete answer) " I already know this " 
So I simply said " If you already know this when why are you asking it to me? Go ahead solve the all by your self "

And as he didn't listened me so now I am also not listening him