lost my site somewhere

I got my domain today, built my site,published and now it's like it doesn't exist. It actually points to one of my other sites. I changed that but it hasn't worked. I cannot find the site I built although it is in my domains list. Please advise, am I moving too swiftly?
It seems I didn't read the first email. OK that's good but what about the site I built. Do I have to start over or can I find it stashed somewhere??????