Go away for the weekends to your parents or something to relax. Literally just stop doing everything. Go to bed, shut the door and make out like you are dying proper man flu style and get all the rest you possibly can now because realistically you only have 6 weekends best case scenario before the real hurricane hits of juggling a newborn, 1 year old, 3 year old and 7 year old! TAKE THE REST NOW! Good luck x
I just saw the bit about your iron tablets making you sick. Mine did this so I asked for ferrous fumarate instead of sulfate and it made a hell of a difference x
Do it! Put your needs first. You’re pregnant and exhausted there should be zero question of you taking it easy or anything. He’s right. You are hiding away and for good reasons. Stay where you are, in bed, feet up and let him deal with the kids if he doesn’t want to deal with them he shouldn’t have had them. Stick to your guns!