What Causes Heavy Headedness After A Fall?

I fell on the ice earlier and hit my head on the blacktop. I feel a bump on the upper back and left part of my head. I never lost consiousness, and did not have any dizziness or vision problems. But I m laying in bed now and find it difficult to lift my head from the pillow. When I try, I feel like a weight on my throat and find it almost impossible to hold my head up. Any advice?