Women who think the world revolves around them and that other people can't make it without their care are only making hard work, both mentally, physically, for themselves.
Your husband won't drop dead if you don't act like his mother. Your husband is an adult and is capable of getting hungry enough to go get food for himself, he's also capable of capable of eating junk food 24 hours a day.
Why???
Because he doesn't have to be an adult and do anything for himself.
Please stop doing for him, if you were my wife and were always telling me to eat healthy or go to bed because it's my bedtime I'd quickly realize you have no respect for me and that you feel that I'm not competent to do anything.
You have to stop and allow him to be an adult or you will find yourself not having any life at all.
I really don't mean to be rude or mean but he is an adult but you're treating him like he's 4 or 5.
As for the baby and pre-schooler in your home, he's an adult and can be handed the baby and told "I'm going to go take a nap, don't wake me up unless it's time for you to leave for work" or "I'm going out for a while, the baby's been fed and bigger kiddo is ready to play for a while".
I know that the whole day revolves around when he's asleep and everything has to be quiet. But there are times when everyone is awake or there should be.
When I worked late evenings into the wee hours or overnights I would come home and want to eat dinner then watch TV for a while. Everyone wants to come home from work and unwind. I'd stay up until 10, 11, or even noon. Then I'd go to bed and sleep at least 6 hours straight. I'd wake up when I woke up. If I slept 9 hours then I'd wake up then. I did not have a set time to get up. I did set my alarm for an hour before I needed to start getting ready to leave so I'd have time to eat, shower, and take my time.
So if I had to be at work at 11pm and had to leave by 10:30pm I'd set my alarm for 8:00-8:30pm. Then I had plenty of time to shower, get dressed, and wake up.
With kids and a spouse he's lucky for now that everyone is home during the morning hours. He can have the normal family time that we all have before bedtime but just at another time of day. If he goes to bed as soon as he gets home then at some point he's up for a while, adjust that family time to a small portion of his awake time. Even if you simply have to hand him the baby and leave for a little while you do need some time alone too. Not running errands or things for the family all the time either. Some of it should be just for you, like getting your hair trimmed or going to the Y to work out or go to a class.
The reason you are resenting him and the things you feel compelled to do is that you are doing things that are not your job. Then because he lets you do all the work you are mad at him.
You will need to talk to your therapist about what I've suggested and I feel confident they will agree, even if it's just a few points, because your resentment is a huge part of your depression, also the hormones and other biological things, but depression is mostly due to repressed anger. Pushing it down and pushing it down and pushing it down makes this hard box of resentment and depression that takes over our life.
Your body will eventually heal but your emotions and your attitudes toward life in general will effect you and your husband for some time.