Some Thoughts Keeping Me Up

Is it possible that light is just what happens to matter when it goes light speed?

If the big bang theory means that the universe was once all in one place, how big was it? and however big/small it was to begin with, why wasn't it smaller? Was it really all just in one finite little bubble? Or is that just as far as we can take the math? And where was it? Assuming the universe can expand implies some space or some context for it to exist in.

Meh, whatever. I don't know enough about this stuff to really get into it.