Label in G mail

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oksel Gepubliceerde berichten 2 Inschrijfdatum zondag 31 juli 2016 Status Lid Laatste deelname 31 juli 2016 - 31 jul 2016 om 19:46
I have a Mac and today i saw that my gmail account labels are all gone.
The labels are still there but the archived emails are all gone.
What can I do there are very important emails lost.
everything is empty
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