Do you really believe that the entire universe was made by a "big bang?" Doesn
I believe that your question is a good one, and that there is a further one that it suggests. The further question is where the dust particles might have come from. Or if we mean by "the universe" absolutely everything, including dust particles, then the universe did not come from a few dust particles or anything else, as, if it did, then the universe came from a part of itself, which is clearly impossible.