Yeah- it's an awful feeling, and so frustrating. I felt like I had studied all the wrong things!
I just have to remember what one of my more brilliant and infulential teachers told us to use as a motto- "Oh, hell, oh well, this too shall pass." As in, it may seem like the end of the world, but one test, one assignment, one screw up in life won't kill you!

Thank you- I'll admit I was pretty dang worried about this sickness =/