Reagan Games, the clicking and churning noise is most likely your lens. It is possible that when it fell the lens came of the guides. Check on here for ideas on how to attempt to fix it. If those do not work, you most likely will have to replace the lens.
this is for Reagan Games :
You need to go and "edit" your original question
You get a window like this
Click on the orange tab marked "Images
a window will open on the bottom of your screen with an icon "Upload"
Click on that and then select the image you need to place on your original question
Once that image appears on the smaller window on the bottom left click and hold on it. Drag it into to edit area for your original question.