3D view is completely warped! I've been using blender for a while now, and this has never happened to me before. I was designing an ad in Blender 2.73a for a game that I made. However, when I went into camera view, everything looked bigger then in the final render. Why is this happening and how can I fix this?

P.S. I've been using blender for about a year, but I still don't know all the buttons, so please no jargon!
This actually isn't to hard to fix.

You are zoomed in (very far) when looking in the camera view. if you zoom out, Middle Mouse ↕  you will see the proper bounds for the active camera.