What Saiyan said. I can second that. I really messed up my exams this year due to the same reason. Just take a moment.. Breathe. Then shut down, give to your mom, or break your phone. Turn of that wifi! I hope you don't even read this. No matter how many replies you get on this, there is no advice for this, you know what you have to. And that is to get your head in those books.