oops2 users found helpful
I suspect, or at least hope, you made a backup. Either through C5, or with your hosting control panel.
For example with Web Hosting With $1 (WHW1.com) hosting control panel of cpanel you have the ability to make a full site backup. So, if you have done this, then you can restore the whole site (meaning everything; databases, email accounts, forwarders/aliases, etc.) to when you made that full backup. In the case of WHW1.com, that restoration would be done for free for you.
Now regarding making use of the C5 built-in backup. You did not state which version you got, but for example in C5 later versions, you can go to Dashboard >>System & Settings >> Scroll down >> Backup Database and Database XML. >> read instructions once there.
I just use WHW1.com hosting control panel backup features, and just retain duplicate site copies too for ease in some cases, and so I have not for a while touched the built-in C5 backup feature.
It would be interesting if C5 had a Trash/Recycle bin to recover deleted stuff from. Hemm.
And depending on what version you are using...there is a built in trash feature in 5.5+.
Click on Dashboard...under Sitemap, click on Full Sitemap. Once that loads. Check the box Show System Pages. Look down the list you will see a Trash folder. Your page should be in there.
As far as the trash feature goes. Thanks. I did not realize it was there. It was hidden from view, and so was the check box. Great. Will play with it.
In case the same thing occurred for the poster of this topic (version 5.5 is what I viewed):
A small modification to jmonroe's post.
Dasshboard>>Full Sitemap>>click Options to point Options arrow up>>check Show System Pages box>>scroll down>>expand Trash Can icon to see deleted stuff.
To restore the page out of the Trash, you would Drag and Drop after the four arrowed mouse icon shows and you left mouse click.