James,
It sounds like page versions might be your friend. If you haven’t made too many changes on the page since then (or maybe even if you’ve made a lot, depending on how often you clicked save) you can restore your page to a previous version of itself (such as before you deleted the conditions). In the page builder for that page, click on More Page Actions and then Versions. These are all versions of your page, created whenever you clicked save. You can click on the little clock row icon to restore a previous version of your page. It sounds like you might want to do that to get back to an instance where your page showed, and then you can delete off what you need again. You can also click Add New Version to create a named save version in case anything else gets accidentally deleted, and you want an easier way to know what page version is linked with what changes. Additionally, you can only keep so many page versions going back so far, but if you add a page version from the Add new version button, it won’t ever get “pushed” off the page version list.
