Been working on this site all day, no problems with plugins or anything else, haven't installed any new plugins, just changing text and photos. Have 2 photos left to upload, and my backend has disappeared, all i get are blank pages. I've tried logging in on 2 other computers, and once I get to a page to update it, it refreshes to a clean white page. The site is present and working as it should, it's just the backend that has disappeared.
Is this a fluke that will fix itself or is there a larger problem here? If I can't get onto the backend to make changes, how can I debug this?