You need to reframe this totally !
You are a heavily pregnant person, working full time, and doing 100% of domestic chores.
He is a healthy person, working full time, doing FUCK ALL household chores.
You BOTH live there, and are BOTH adults, both working.
You BOTH contribute to making a 'mess'.
You BOTH eat, so need food bought/cooked, and use plates/cutlery etc
You BOTH wear clothes, which need washing/ironing.
So exactly WHY does he think it's YOUR 'job' to be his fucking Mummy ??
He DOESN'T need 'looked after', he's NOT disabled in any way, so why the fuck are you running yourself ragged, while heavily pregnant, and accepting it ????
It's NOT fucking 'help', because it's NOT YOUR JOB !!! (You go to work and get PAID for your JOB FFS !!)