WordPress has a built in "revisions" feature. This allows you, on a page by page basis, restore back previous automatic page backups. You'll find this option on the back end editor of any of your pages.
Click on "browse" and then you'll see a slider. Use your mouse to slowly drag the slider left until you see a previous revision you'd like to restore. Below will be the raw html of both pages for comparison purposes which sometimes can be helpful.