My Bible says the first thing created is light.
I would refer you to: Age of the Universe
By Dr. Gerald Schroeder
http://aish.com/societywork/sciencenature/Age_of_the_Universe.asp
You have assumed that God is in earth time and on earth for your 6 days. But the Bible does not say where God is until the end of the 6th day, when He creates Adam. This paper shows that at the source of the Big Bang the span of 6 24 hour days equals 16 million years on earth. The rapid expansion of the universe makes the difference. It really is amazing!
I once saw a religious program hosted by a jewish rabbi/physicist. He used that very explanation. I would simplify it by taking a 6 inch rubber band then ink off every inch. Then stretch it out as far as you can..That origional 6 inches is now several feet long........