Tailspin,
Regardless if we are discussing 9/11, landing on the moon, eating meat, a theory by George Cantor or your father, the position of the earth in the universe, global warming, the big bang theory, first cause, etc. etc. the underlying takeaway here is how do you know, how do any of us know what is or is not true?
First cause, the origin of matter are philosophical discussions. The bing bang is theoretical, it is a "best guess". There are only really two possibilities, either all matter has always existed for all eternity or at some point in time it was created. If it was created once, then what is to say it could not be created an infinite number of times? Given you don't know, no one knows, even Stephen Hawking and the best physicists in the world cannot explain first cause, in my opinion you are choosing to allow the unknown to provide you an excuse to avoid other things in your life.