C-Section scheduled in 3 weeks

I just scheduled my c-section on Tuesday. I don't know why but that made this whole pregnancy real for me. I have 2 girls already (3 years old and 2 years old) but I think because this one is a boy, I'm getting a little overwhelmed. My husband usually goes to bed around midnight while I stay up cleaning up after the girls and doing dishes and laundry. By 3am I'm so tired but I can't just lay down anymore. I want to keep moving. Tonight, I decided to relax and not over clean and do extra stuff. I've been sitting in my glider for the past 2 hours crying about everything. I usually don't let stuff get to me but the stress of not having anything ready is starting to.. My cousin gave us a bunch of clothes and nice bottles from her son that was born last September so that helped a lot. We have 3 weeks to get a car seat, mattress for the crib, sheets for the crib and a pack n play. I'm not breast feeding because of personal issues but that added stress of not being able to give him the best is killing me. My in laws are coming down here from Ohio for the birth and I keep telling them not to bring the kids (they're young) because of germs and the fact that they can't be quiet and respect privacy but they don't care what I say. I don't want to be that annoying person to make a visitor list but at the same time, I feel like I'M the one having this baby, I should have a say in who visits and who I don't want to be there. Is that selfish? There is no point to this post. I just need to vent. 😖😭