Memories where art thou?

I am trying to remember details of my childhood and I can't seem to piece together a complete picture. I have bits of recollection, tiny fragments of events but nothing really concrete or solid that I can draw on and say this event really happened. It's weird  and for some reason it bothers me.
What does this say about my childhood then? Was it so bad that I have blocked it out? Or is it just a natural thing that happens in most people's lives? I guess I should ask around or do some research. I'll probably forget by tomorrow.