I've thought about this before. Much more than that; what if the entirety of the observable and non-observable universe is just one fragment of a "multiverse"? These are the things we don't know. Or maybe the whole of our universe is just like a little science project for an alien species somewhere :p.

Before the bang (whether big or small) what happened? I mean; was the "bang" the beginning of the existence of the universe? If it is; then what initiated the bang? Remember one of Newton's laws of motion that expresses the fact that things would continue in their state of rest until acted upon by force.
That means, sometimes must have triggered the bang. And if something triggered the bang, then that thing existed before the bang, and that means the bang isn't the beginning of the universe... Many things we don't know

Nice piece buddy