Prepared Mamas

I'm 17w4d and I'm pregnant with my second child (little rainbow baby 😊). I've started buying diapers and wipes to start stocking up ahead of time. I've been told buy certain family members that baby showers aren't as big of a deal for the second child. So I just want to be prepared in case I don't have one. What are some other baby items that I should start stock piling? It's been 5 years since I've had a newborn and somehow I feel like I'm starting all over! 🙈