Please help, made a mistake!

Hi.

My recent domain to my wordpressblog is https://isas.se and a couple of minutes ago I was about to change it but when I did, I only wrote the new domain at one place and now I can’t login, starting to really panic!

When I try to login, the linkarea changes the link from “https://isas.se/blabla” to “https://newdomainname.se/wp-login.php?redirect_to=http%3A%2F%2Fisas.se%2Fwp-admin%2Fedit-comments.php&reauth=1” and I only see the text “The requested URL /wp-login.php was not found on this server.”

What should I do? Is there even anything I could do or have I destroyed the blog forever?

Since I downloaded the program, I can’t fix it at any wordpressite. Or at least, I don’t think I can?

Is there anything the wordpresscrew could do?

It seems to work posting new stuff from my iPhone with the wordpressapp.

Please help!