There always is gravity Twake. But it is nonsigular. It is spread out.
The original energy must be spread out so that its gravity won't
be so strong as to prevent the big bang expansion.
Light/energy has gravity in General Relativity.

Began as light?
The original energy couldn't be light. It would produce matter/anti
matter in
equal amounts. Matter/anti matter would be alltogether in one place
without any possibility of seperating out.

Not possible.