I did some more investigating and learned how to put my site into debug. That showed that there was an error in my database. I found this article on how to repair my database http://www.maketecheasier.com/fix-corrupted-wordpress-database-2/ and that worked!
I had already tried deactivating all the plugins and it wasn’t a plugin issue. Just tried changing to the 2015 theme and still have the problem.
I think the error is in http://simplykellydesigns.com/blog/wp-comments-post.php because that is what it shows as the URL when it shows the error in the browser. I’m not sure how to isolate the problem beyond the file though.
