It seems logical that your early fears play out in these dreams, but that's just a guess. You are bound to be somewhat disturbed by your in dream actions if they are not what you would wish in reality.
I used to have a regularly repeated disturbing dream (nightmare?) for years that involved me being in a sand pit at night with large coloured balls (think hard shiney and heavy snooker balls but 3 meters in diameter) rolling one after another along the wires on telephone poles and dropping off the end onto the ground. That was about the sum of it, but it was disturbing enough to wake me up each time I had it.
Other disturbing dreams involve size as well, I used to have regular waking dreams where I was awake and aware but obviously not 100%, I'd grip my wirst under the covers and it would feel like a finger and really freak me out, then I'd grip my finger to check and it would be huge.
Others involved car chases and suddenly I cant reach the pedals or see out the windscreen because i have shrunk.
The joys of the mind eh?