This is pretty good, a lot of good detail. Two minor issues, one is "she body began to quiver" obviously this is one of those changed your mind in mid-sentence editing errors. And two, the image of "she saw the shadow upon her closet door " didn't feel right to me. Was the door open as the shadow came near? Then, ok, but it isn't clear it is open. If it isn't open, I can't imagine how you would see the shadow without seeing the arm that opens the door, or even half of the body. Bonus suggestion, using thoughts twice in the same sentence seemed a little awkward, you might consider changing one. Still, pretty good.