time and anti-time

＂Ｗｈｙ　ｄｏｅｓ　ｓｏｍｅｔｈｉｎｇ　ｃｏｍｅ　ｆｒｏｍ　ｎｏｔｈｉｎｇ？＂

Lately I have been thinking about the ultimate question. The universe, where did it come from, and why? Precluding the existence of an omnipotent figure, which would simply shift the onus of causation a further step, the universe simply came from nothing.

Right now my conceptualization of this nothingness is that it is a temperature of absolute zero,  or perhaps less than absolute zero. Some property of the nothingness causes matter/energy (same thing anyways, simply at a different energy level) to come into being. This property has to exist, because the existence of me writing this affirms that I exist, and without the beginning of the universe, I could not exist.

Apparently at very cold temperatures, matter crystallizes. However, I would guess that as matter passes below absolute zero, it would become antimatter? Matter plus antimatter causes large explosions, and hence we get a big bang...but what about the matter-antimatter? Where did that come from? Theoretically 'absolute nothing' should contain neither matter nor antimatter? 
For that matter, if it was so cold, shouldn't time itself slow down, stop or even reverse itself, as it is a measurement of vibration of subatomic particles(?) Is there anti-time? Even if there were, still that doesn't explain the something from nothing effect.

I also wonder what the connection between the term 无极 in ancient texts and my idea of nothingness, they seem quite similar. 无极---〉阴跟阳---〉太极 yes, there it is, wuji leads to yin and yang, which combined together make taiji...but why why why...