Look into white holes and also there were stars and galaxies discovered that are older than the Big Bang evidently in the past year or two, I’m pretty sure Neil degrasse Tyson is the one I heard it from too

Have you seen the simulation theory stuff? That none of it is real & we are in what amounts to someone's video game. Seemed a little far fetched until that satellite which takes pictures at the furthest distance, it snaps like every second forever, & it took 2 identical photos 40 years apart - big deal you say? Actually yes, mathematical chances of taking the same picture of millions of stars in the exact same spot - impossible. Then there's the parallel universe thing, something to do with everything created has only been allowed to see/sense what it needs to survive & reproduce, so it can locate food & keep it's breed going & everything think it's know the whole picture - like the bat as an example, a bat can't see, it can hear food & mates, so to a bat the universe is pitch black, & a very small area of space - but there's a whole world happening around it - the bat thinks it's knows everything but knows nothing. Now look at us, as the bat. Same scientist said he thinks there's something in the spirit/ghosts stuff too, that they're simply us in a different version of where we are, overlapping into current - & potentially the same with whatever aliens are, they can come & go, but we can't because we can't see how, yet, & that our brain still has like 95% of it's ability unknown to us. Crazy thinking? I used to think so. Now, idk.

God.

Does “before” even existed before the big bang? Since mass can bend space and time, who knows if time even worked the same, like when they go close to the black hole in Interstellar, time is dilated.

We have no wayof knowing. There’s speculation, but no one can say anything concrete. It’s not necessarily that the big bang created everything, but rather that thr big bang is the earliest thing we have evidence for.