Nesting already? 18 weeks? After loss.

We have a 3 year old boy currently but In 2017 we said goodbye to our son at 22 weeks bc of placental abruption, and almost lost my life as well.. I’m pregnant with our rainbow baby now 18 weeks with baby girl (Hadleigh) and I feel like I’m already nesting.. all I want to do is spend time in her room. Getting it ready, painting, looking at stuff online, wanting to pack our bags.. maybe is just me being excited bc we got another chance.. a miracle.. am I crazy?