I created a link for a new page in my SharePoint 2013 subsite using double brackets. When I click on the link, I get the 404 Page Not Found error. It does not ask me if I want to create a new page. I suspect that at some point, I clicked my link and it asked me if I wanted to create a new page and I said OK, but never followed through. If I go to my link and add a letter (creating a new link) it works perfectly, asking me to create a new page. I tried to check-in/check-out, delete the created link and create again, then it tells me it already exists. So, my pages exists but is not found.
How do I find the page that I sort-of created a few days ago? I have only been using SharePoint for a couple of weeks, so I am really lost.
Here is a link to notes about my problem: