Okay, so I took my time to read your post, and here's my response:
If you want to learn more about these sorts of physics, and I suggest you do, there is a relatively easy-to-read book aimed at non-academic audiences called "The Elegant Universe", by Brian Greene. I recommend it to all people who want a greater understanding of the current state of physics without all the mathematics and formulas and principles physicists have to cram in their head.
Now I don't know all the physics involved, but I understand quite a bit. Also, it's not the events of the Big Bang that get me.. I can at least comprehend that, it's the messy bit about where did it all come from?
Not necessarily, time could be like a moebius strip: With no ending. This is beyond physics, and into the realm of philosophy, so that guess is as good as any.
Even if that chunk of matter came from another Universe, or a previous incarnation of this one it had to come from somewhere.
Does it matter? Even if you're just an illusion or a character in a video game, you might as well enjoy it while it lasts.
As of right now I'm trying to decide if I believe the Universe exists at all..
You can think like that, or accept René Descartes' "cogito ergo sum" line of argument.
Strangely sounds like it supports the the bouncy universe hypothesis: That the universe inflates and contracts and inflates and contracts, etc.
What is making me write about this now is I just read that scientists now think they can look at the Universe before the Big Bang, and that the BB was not what created the Universe, but more a change from what the Universe was into what it is now.
As I said, maybe the forerunner is this universe. It's really hard to make limits on the geometry of space-time, so it's completely possible.
If space-time was really messed up who knows what could have happened, but that sill leaves me with the question of where did the forerunner of the Universe come from? Nothing? Maybe.. Am I the only one who thinks about this stuff?