Everytime I try to go to wp-admin, instead of the login page, I get a error "Internal Server Error" 500 page.
This is something that couldn't have been going on for very long, since I was writing a post in WordPress about a week ago.
I tried to reinstall the latest WordPress download and now just going to it to view the journal entries gives a 500 error right off the bat.
I contacted my web host, and it turns out that somehow the file permissions had been changed on my WordPress directory to 777. After changing it to 755, it works fine now.