I amm pregnant - i need advice on ESA

I am married, pregnant with my second child, have been a homemaker for 3 years.
My husband works full time and we get child tax credit, housing benefit and child benefit.

Am I entitled to some extra benefit, now that I am pregnant?

I do want to start work after 6 months after my child is born and need some support, so can I apply for esa??

Will esa deduct my housing benefit?

Thank you.