so I know someone has purchased our travel system [stroller and car seat] and bases because of the…

so I know someone has purchased our travel system [stroller and car seat] and bases because of the registry online. the problem is I still haven't had a shower (it's a surprise and nobody will even tell me the date). I keep getting notifications/emails "install the car seat now and have it checked"...uhh can't do that without a carseat!!! really regretting telling my husband I wanted the shower to be a surprise. I'm so anxious. technically baby could come at any time (even though I want him or her to cook for at least 4-6 more weeks) and not having the basics ready is stressing me out!!!!!!