What does this dream mean

I keep having this same dream over and over and over and over again, I can't get any sleep..and It's bothering me.
I am a wolf, I'm black with Blue eyes..and I am following this big black bird...trying to keep up with it..I'm running through woods and fields then I get to a road. I stop and I turn around and start running the other way, but this time I am being chased by the black bird and I keep running I rich a river, and I am swept down the river..I fall over a waterfall, the bird watching me over head. I fit the water and craw to on the bank and keep running. I run over this dead tree that goes over this very deep cliff I reach the middle and it starts to crack,I reach the edge just intime and keep running..finally I get to a shore of water there's Ice in the water. I jump from piece to piece. But that slows me down. I get picked up by the bird and it takes me higher and higher then it drops me.
When I wake up I am shivering, and I can't go back to sleep because of it. I started having this dream last year. and keep having it. It's infecting my grades and social stuff and everything. I just want to know what it means.
Can you tell me what you think it means?