Changed URL and now can’t access my blog

Hi there – I’m very confused -as usual. I created a blog with the url: kiddiekort.com
I did this to have something up until I could create my webpage. I decided to create my page using Compozer, but when I tried to access my site, it redirected me to my blog. My thought was that I’d have to change the url name on my blog so that it wouldn’t redirect customers there when typing in https://www.kiddiekort.com so I changed my blog url – at least I thought I did, to kiddiekortrocks.com. NOW I can’t access either one. What do I do? Please – any advice would be appreciated.

Thank you!