Essays / I don't know how to start my essay.. [13]

Essays terrify me. So much so that I have fretted over and ignored the ones I have to write for the end of the semester. I have a 6 page paper do Wednesday and a 8 page paper do Thursday. I have written maybe half a page for the first paper so far. I go from being frustrated, to being determined, to breaking down into a crying wreck because I don't know how to get this done!

I'm just not very good at essay writing. Style and such isn't much of a problem for me so much as content. I can never seem to write a lot about anything. I'm a pretty quiet and unopinionated person by nature. Most students and professors talk about how hard it is to keep ideas in line and so they can all fit in the page limit. I have the opposite problem, I have a hard time writing enough to hit the limit. It makes me feel stupid, but I know I am not. I do well on exams and I've done quite well on the papers I did last semester... I just don't know how to go about it. I feel lost.