Du calme! If it makes you feel any better, school's been kicking my ass too. My mom and I always laugh because The Real World ALWAYS throws everything at you all at once. It doesn't give you one thing to do at a time, because that'd make too much sense. Pffffttt...

I suck at everything! Everything is terrible and horrible and bad! *melodramatic flop to the ground*
THIS. THIS IS ME UNDER PRESSURE, OH MY GOD. But somehow, I'm able to pull myself together and do everything that I need to do. Granted, I'm not in grad school, so I have no idea how much pressure you're going through currently, but! You can do it. Find a way to let out your frustration, then tackle The Million Things To Do to the ground.

So tl;dr: I BELIEVE IN YOU, YOU CAN DO IT and I feel your pain (unfortunately).