Pages section of blog disappeared

I noticed this morning that the ‘Pages’ section of my blog is gone. I can create a page successfully, but it cannot be displayed on the blog due to there being no links to it.

The only changes I’ve made lately is the addition of the AdSense plug in. BUT, I noticed the issue with the Pages before I installed that plugin. I now have no way to include pages on my blog, can you help this beginner with what might be wrong?

Oh, and I have also not changed the template at all.