oh hun, dont blame yourself for this, it's not your fault. and if you do, bub will pick up your vibrations and feel that it's not wanted. and you dont wanted that...

i think it's unfair of him to expect you to do so much when you have 3 kids to look after and being pg; if he's at home not working and expecting you do all the work. even if you do the housework, he can take the kids off your hands and look after them.
are you able to cook extra and have leftovers for a couple of days?
i know how hard it is when you are so tired and feeling so sick and having to cook. and the thought of food makes you sick.

can jaz and bri help with the chores?

take care, hun. xoox