Half of my post is missing!

Hi, I posted a new post on my site last week (www.tryhigher.com), and it is only showing up as half of the post. I keep trying to add the second half again, and it will look like it is “thinking”, then go to “This page cannot be displayed.” I’m wondering if something went wrong when I last updated the site? The rest of my other posts are suddenly all showing in bold font also. Does anyone know what’s wrong?