Evan
Thanks!
It is all rather complex, to say the least.
If the question is silly, please forgive me.
Before the Big Bang, did the particle of matter emit energy or light?
Well, first of all, there was no Before the Big Bang. At the Big Bang, not only was empty space, and all energy created, so was Time. That is the Space-time continuum that physicists deal with.
So AT the Big Bang, all energy was in one place, no room for particles and it was too hot. Einstein gave us the equations E=mC^2, that is matter (m) is a form of Energy (E). So, until the energy dispersed enough, it could not condense into matter. Similar to how water cannot condense from vapor to liquid until it is cool enough. If matter gets hot enough, energy is again released as the matter dissolves: the Sun, and atomic bombs are examples.
Initially, there was Light (energy) and a bunch of rules concerning how the universe would work. But eventually the universe cooled. See this article:
burro.astr.cwru.edu/stu/advanced/cosmos_history.html The particles first appear in what it calls the “Quark-Hadron Transition”. Til then, rules are being formed and energy is being moved about that sets up the general shape of the universe and how it will work. Of course, that epoch ends within the 1st second after the Bang.
If you read about the Plank Epoch, it discusses the ‘diameter’ of the universe. How far you need to go to get back where you started.
Note: mathematically, the diameter is the largest distance across an object (diameter of a circle is easy, diameter of a square is corner to corner, of a universe: distance til you are home again

)
Hope this helps. Your consulting mathematician