What we call "the universe" with its various properties came into being at the point of the "big bang" or expansion. However it is incorrect to assume nothing existed before that. It was a point of singularity which existed. The entropy for that point was infinity for an item that size. Time did not exist prior to the Big Bang as there was no way to measure it. Also there is no frame of reference in quantum physics for anythig outside of that point, i.e. there is no place that "God" could exist.
"On Earth as it is in Heaven, the Cosmic Roots of the Bible" available on the Amazon.