How did the universe evolve from one positive Matter particle

Was that particle some kind of un-imaginable super dense mini spec that couldn't contain itself so it just exploded (big bang) and every Physics theorem was there but on a miniature scale? (That's what I saw on a Hawking Documentary...about the Universe first being a positive matter particle). Where did that particle even come from!? Oh and I also heard that the fact of nothingness is unstable...does anyone have any knowledge they could share or if this is actually correct about the positive matter particle? Please! :D

There was no one positive matter particle - that isn't understanding the Big Bang at all. Whilst we don't know exactly what happened, it seems that fluctuations in the energy fields (some say caused by two branes touching, i.e. two universes - if you believe the multiverse proposal) caused an explosion, but it wasn't an explosion of matter, it was a ball of energy so hot and dense, there was no distinction between matter and radiation - such things didn't even exist, so therefore no particles. After a while, as the universe expanded (the universe being the ball of energy) energy decoupled leaving either radiation such as light particles, or matter particles such as hydrogen. Almost every particle had an opposite that was made of anti-matter and they would collide, destroying each other. By some quirk of our universe means we happened to have slightly more matter particles than anti-matter particles, which is why in our part of the observable universe matter seems to dominate today.

The big bang was not an explosion, it was a rapid expansion of space. So was it a, "spec that couldn't contain itself so it just exploded"? Nope. Although I have no idea where you're getting this notion of a "positive matter particle", Hawking never said anything like that. What is that even supposed to mean? Regular matter as opposed to anti matter or something? Regardless, we know that there was no matter (of any kind) during or even for a little while after the big bang was already underway. Perhaps he said something about positive energy, as opposed to negative energy (gravity). That's hardly the same thing.

There was no "particle" as such .

Just after the creation of the universe , the best indications are that there was a (scalar) "field" of huge energy -- and it was the transformation of this which gave rise to "inflation" and the creation of matter .

What gave rise to this energy field is then anyone's guess

A singularity is Neutral so any of this "positive stuff" is something after.
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The Higgs was probably the first to form from the quantum fluctuation.
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The show you was watching was probably over 2yrs old ..and in Astronomy terms ... your in the stone age.

The Big Bang itself came fromm a quantum fluctuation in the nothing.