wp-admin/edit.php connection reset

I’ve been working on a new post today, and first I couldn’t get to the Visual editor, I was only in HTML. The Visual link seemed to be dead.

NOW, I cannot get to /wp-admin/edit.php at all. I click on Posts->All Posts, and the page seems to time out, and I get this error:

The connection was reset
The connection to the server was reset while the page was loading.

All other pages are navigable, and I don’t know what’s wrong. Can anyone help?