Falling in your dream means that you are challenged by insecure and unbalanced real life conditions. This might be a result of the situation in your work or love life. You might be feeling as if you have lost the control of your life and you are going with the flow. It looks like there are not much people around you that you can put trust in.
Maybe your fears of failing in your work, school or relations might be surfacing. Your self trust is not yet strong enough to fight with these fears.
Falling dreams more commonly observed in the initial phases of dreaming activity.