A doubt on loading Scenes

Hello everyone. I'm working on an app with unity, in witch will have a button "My acount", the button can be accessed from any scene. I have all buttons working similarly to change scenes with:

 void OnMouseDown()
 {
     {
         Application.LoadLevel("scene_name");
     }
 }

However, this does not work to "my account" scene, as it has to go back to your previous accessed scene.

Can anyone give me ideas on how to make this work?

Thank you very much.