No it's not. Until now, the only thing I've ever heard called "Scientific Fact" is Global Warming.
The Big Bang is a theory. And I've never heard it called "Creation from nothing." But since we learn about the early universe by measuring the Big Bang's aftermath, it doesn't seem likely that we'll be able to learn about what came before the Big Bang.
I have read about the spontaneous creation of particles that are usually unstable and promptly disappear again. There's some speculation that spontaneous creation of a STABLE particle in our empty universe may have created a distortion that caused a flood of particles (i.e. a "Big Bang") to happen, but that's just wild-assed conjecture. It's not part of the more widely accepted Big Bang Theory.
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