In the time this issue occurred I have not updated Blender. So I started learning blender recently and was getting the hang on some shortcuts then after an hour or so of work, literally midway through a project, my shortcuts changed. The most noticeable one is the search changed from F3 to TAB which means the Edit Mode shortcut is no longer on TAB. This is really strange and is putting me off working anymore. I checked if it was my keyboard changing languages but that was not the issue.
Any help would be greatly appreciated, I just want to get back to learning :)