Stumbled across another useful feature for those using Office 365 on your browser. You can get to your documents history by clicking on your profile image (top right). If you have delve loaded (you can find this as an addin on the apps page) you will be able to see a history of what you have done:-
What you need to get Delve
Delve is available for Office 365 Enterprise (E1, E3, and E4), Office 365 Education (E1, E3 and E4), Office 365 Government (E1, E3 and E4), Office 365 Business Essentials and Office 365 Business Premium.
Regardless of which of these Office 365 plans you have, you need to activate the SharePoint Online service and assign users a SharePoint Online license before they can start using Delve. You also have to set up Exchange Online if you want attachments to show up on users’ Home pages in Delve. If you set up Skype for Business Online, users can start Skype for Business Online conversations directly from Delve. And if you set up Yammer Enterprise, users can engage in Yammer conversations about documents directly from Delve.
Delve is designed to work with the current or immediately previous version of Internet Explorer or Firefox, or the latest version of Chrome or Safari. For more information, see Office 365 system requirements.