WP LOGIN PROBLEM

Hi, I please for a help. I really dontkow what to do. I am not expert, just student with web page and my problem is thath i can not login into WordPress in my web.
My WP is installed at page ako-tazit.kryptomeny.sk (without www). The last change I did – in WP section – in SETTINGS (GENERAL) – I changeD a url adress and saved it.
After this step, it automatically reload me to the login formular – in my WP page. I tried, as standartly, write nick ak password for WordPress login but the page is just reset – an no is happening. Even I tried to click on – forgotten password, in order set up new password, but the same result. Page for WP login is just reloading and nothing happens – whitouth any reccomendation or warning sentence.

Also my page is down – homepage is being loaded but others page are inactvie.
Plesa plesa for any reccomendation? I would be very grateful.