From a Feng Shui website:
"Sleeping in line with the door also exposes you to excessive Chi, which can contribute to stress, irritability and health problems, but keeping your bed in commanding position prevents you from negative influences and puts you in control of your space and of your life."
I've been feeling really off lately and I swear to Shiz it started when I rearranged my bedroom. I hate having my bed by the door! Totally moving it back to where it was, which just so happens to be the commanding position.