Hi K.,
I just wanted to add a few more and agree on a few also.
I would also quit your job before the baby comes if possible. Get you and your daughter on a routine of what our daily plans will be.
Also I would wait a couple of weeks after baby comes home and then start your daughter with the potty training again. My 3rd child was turning 3 in May, I had my 4th child in November, I started potty training her in March and she was going potty by herself after 3 days. We waited until after bringing baby home, the holidays and then we jumped right in with no problem.
As for you older one and the new baby just start teaching to be "gentle", and if there is jumping in the house or things like this you might try to curb that as soon there will be somebody right in the line of fire, so to speak.
Also when my youngest was a few weeks old, my older daughter (3 y/o now) heard the baby crying while I was making her a bottle and she went in the pack-n-play/bassinet where she was laying and picked her up. She had climber on top of a little pooh car we had and stood on the stearing wheel to get to her. I have no idea how she didn't fall with her, and I was just in the kitchen, not far from them.
Also I will say this I formula fed but my daughter still imitated what I was doing, they will ask question no matter what you are doing. Oh and since you are having a boy this time and she is a girl be ready for the question of what is that and why doesn't he look like me ??? The difference between boy and girl parts.
And I use dish cloths, a new one everyday and maybe even 2 or 3 a day depending on what is going on. I'm also a home child care provider so I clean my door knobs, baby gates, high chairs and baby toys with bleach water 200-400 parts per million. I clean every week the whole house, deep clean(chairs, high chairs, toys onece a month).
Copngratulations on the new baby coming, W.. Have fun with your older daughter also. I know I do with my 4.