Can't log in or out of my site

For some sudden, unknown reason, when I go to my website- I no longer get the login screen. It goes right to my site, however when I click on ANYTHING, I get an error that reads, “Please login to to view this content”. I click on “login” and it simply reloads the same message… Can’t log in, can’t log out… I need to get into my admin page somehow and break this pattern… any help would be greatly appreciated. Thank you.