You're at least asking the question at the right level. Most people get bogged down arguing about how the something that already was became different stuff that was. "Why is there something and not nothing at all?" is an excellent philosophical base to start building a cosmology on.
Just remember science is about what and how, when you get to stuff like why, it's philosophy. 90% of all of the ridiculous arguments that seem to happen around this subject appear due to the inability to keep these separate.
>It is probably the largest thing that is holding me to my faith in an a God.
How does the existence of a God explain the absence of nothingness? Infinite regression, and all of that. That is one of the things that would keep me away from a faith.