When to start getting ready!

Jessica
We have exactly 4 months left until our baby boy is here and we have done nothing to get ready for him. No nursery, no diapers or anything. I guess we didn't see the rush or maybe we were going to see what people bought us... Anyway are we crazy? My Mom came to visit and was appalled that nothing has been done. When did yall start buying things and get the nursery set up? It's our first so I think maybe I'm jut overwhelmed with where we should even start!