what does it mean?

i have this recurring dream, where i am playing soccer.. sometimes my fellow players are friends and family, sometimes it's a professional big-league with some of my idols. and in every dream, usually at a crucial juncture.. my legs turn to lead and i can't run fast enough, as if my feet were stuck in wet mud, and the ball rolls further and further away.. hard as i try to chase after it, it's all to no avail.

waking up from this dream always leaves me despondent, and a dark foreboding always clouds my mind as i start the day. can anyone help me out with a few suggestions as to what it might mean?