This is the 2nd time this has happened to me within a week and I'm not sure if my site's being hacked or what.
When I go to sign-in (http://www.destroythebrain.com/wp-admin), I get text displayed "Warning: Cannot modify header information - headers already sent by (output started at /home/content/t/r/i/triefy/html/wp-includes/pluggable-deprecated.php:1) in /home/content/t/r/i/triefy/html/wp-includes/pluggable.php on line 881" and do not have the ability to sign in.
This happened on Wednesday and I uploaded WordPress again & even upgraded, now I'm in the same boat I was. Any suggestions? I can reupload WordPress again, but there has to be something that is causing this.