Baby #3 and feeling so lost

Jackie • Mommy of 1 girl 3 boys and 1 girl on the way. Not all biologically mine but I'd kill for them all ❤️

I feel like I am lost on what my baby needs and it's my third. I have a few apps for checklist but what are the best ones to use? I want to feel prepared. I'm 20 weeks and somehow having a panic attack over possibly not being ready. 😵