"...and where did this tiny "packet of everything in space/time" originate?"
If physcists are correct that matter and energy can neither be created nor destroyed, I would have to say that it has always existed and was never created.
Well, there's precedent for that: the Bible says that God has always existed. He has no beginning and no end - but, of course, it would require a lot of faith to believe that space/time, er, I mean God, has always existed. I mean, how could one set up an experiment to test whether space and time have always existed? I don't see how it could be tested! Therefore, since we cannot empirically test whether space and time have always existed, we, being the sciencists that we are, MUST reject the theory that the universe has always existed (and God as well).
So, now I'm left with the question: Why is there anything? Why not nothing?