My left-side Upfront editing panel has disappeared and my content is all re-arranged

I did a lot of work testing all the functions of Upfront and had it all mostly working and was then looking into how to add sidebars and left my home page Upfront editing space to try to add a posts page with a sidebar and ever since then if I try to Upfront edit my home page my left-side Upfront editing panel has disappeared and my content is all re-arranged and all out-of-place so I can't do any edits anymore. I have logged out and logged back in but no change. Support access is enabled.

Also, where does my home page show up in Pages so I can go directly to it?