I'm not a cosmologist or physicist, but I've thought about this a lot, and would like to know if there is any validity to what I hope to describe here. If I get lucky and have got this right, it could help the qualified folks some.
I have a suspicion that the singularity event was caused instantaneously due to a paradox. If non-existence exists, it has to allow for existence. I think the inflation event expanded at about 40x lightspeed. How? Because einsteinian physics had not yet come into effect.
I wonder if the inflation event caused a shockwave. I think it's quite likely. It may even still be travelling at 40xC.
I also wonder if this supposed shockwave is dragging the rest of the universe behind it somehow, which could account for why the dispersal of the universe is happening at an accelerating rate.
I apologise for my lack of knowledge in this field.