I had these kind of dreams a lot too, I finally traced it to the root in my childhood where I was so stressed and it affected my concentration in school so I stayed back in first grade. I always felt I missed something important like I had to go through school in spite of a missing piece that I could not explain.

The real missing piece was my never really feeling "safe" growing up, but I didn't understand it at the time.

I think these are common dreams of victims of abuse too, especially if abuse/neglect took place in childhood, when a child is expected to just grow up without the right kind of childhood where they felt safe and nurtured.

When you connect all the roots and finally realize that you "can" take over and you "can" achieve in spite of whatever was lost to you, then many of the haunting and puzzling feelings will slowly weaken more and more.

OE