The dream perhaps the nightmare

I have been having this reoccurring dream since maybe the beginning of October. The dream starts and I am walking along a tree lined path the period of day is not obvious the sky is colorless, perhaps it doesn't exist, there is no moon, no stars, no sun, no clouds. The trees are leafless but they are beautiful brown, the grass is a yellowish green, the path is dirt. The emotion I feel is calm, I am content as I walk. I look at the sky, or the gray abyss, then down at my feet. As soon as I look back ahead of me I notice I am not longer walking but riding a bike a glance down all I can see is the tire, no bike frame, I am still content. As I go down a hill the sky begins to darken and the trees go black, I am not scared, but I start to feel anxious. I am walking again and the trees begin blowing as if there is a strong wind but I feel no breeze. I feel kind of panicked I try to run, I do run, but I can not seem to run at a pace faster than a jog even though I am in full sprint. The trees begin to thrash violently side to side, left to right in front of me. I turn around, the road is paved but ends three feet behind me. I look ahead again the road is paved, the road is crumbling. I am scared. I look down the road is dirt beneath my feet. I tell myself to run off the path into the woods, I can not make my legs move. The road the trees the grass disappears, I stand alone in darkness on a tiny patch of dirt. The ground beneath my feet disappears, but I do not start to fall, I wake up. Confused and panting, I do not go back to sleep, I day dream and I just see the path lined with black angry trees. I am at a total loss for an explanation.