So I downloaded this example project from the asset store, I was looking through the scripts and when I switched back to my project the input manager was using the same one as the example project, so is there any way I can get my Input manager back or do I have to map everything again?
Importing a full project will overwrite your input settings if it includes any. The only way back is from a backup or starting over.
In the future you can save your settings from the ProjectSettings folder inside your top-level project folder (outside Unity). The file is InputManager.asset.