Where are my Sent emails, I am desperate please

Today is May 23.  Something happened to Windows Live Email system at  4pm.  All my emails in all subfolders moved and lumped into the Inbox, or "Quick View" box.  All subfolders were lost.  And all my sent email in the sent folder are gone, not one of them is there, except the one which I sent tonight.  Have I lost all my sent emails?  Please reply quickly, I am desperate to get them back.  Is it possible they are lost?  Because if that is the case, I am in big huge trouble.  I need them back, please.  Afterwards, I might not use Windows Live again, what an unreliable program, that loses your work.  Very disappointed and frustrated.