Help, I cannot access my dashboard

So I have tried many ‘fixes’ I have found online and nothing is working. I just did a complete re-install through ftp and im still having the same problem. Whenever I add /wp-admin to my domain i get sent to my hosts 404 page, which is weird because i do have my own 404 page set up using the .htcacess. my site is calvinmorrow.tk/
I can get the wp login screen to appear whenever I use /wp-login.php but whenever I type my name and password I get 404’d, only when its the correct name and pass though. So I guess the main issue is the dashboard not appearing.
If anyone knows a cure to this I would be very grateful thank you