Hi , I own a mac and yesterday morning when i open my mac and reached the login area i accidentally clicked on the guest login and the comuter lagged . I then switch off my mac using the button on the top right hand corner . When i on my mac again and login to my account , I realised that my files , pictures and documents are MISSING and there is Downloads and Documents file on my dock , when i click it a question mark pop up on it . Can anyone help me ??!!