As of yesterday afternoon 3 main things happened at once:
1) My username and passwords stopped working
2) When trying to retrieve password, username not recognized
3) The contact forms on my live site stopped submitting (hitting send does nothing)
I've checked my SQL database and the usernames are in fact still there. I've tried creating a new admin from the database but this had the same issue. Because the contact forms on my site stopped working as well, this leads me to believe that it's more than just a login issue.
The siteurl is correct and I've tried troubleshooting based on these instructions:
Seems that forms just stopped working including the wp-admin login page. Any help appreciated. I have WordPress (Version 3.8.1)