Thank you for writing back with that information and I am very sorry about your issues. I believe you did not delete those emails, so I am sure 2 things could have caused this.
First, your account could have been hacked and the hacker messed up your emails by sending them to Trash. Please MOVE the emails to your Inbox to save them from being deleted permanently.
Second, the hacker, or you, could have created a filter that automatically sends NEW or incoming emails to the Trash folder.
Please check your Gmail settings, by clicking on the link below while you are SIGNED IN to your Gmail account:
REMOVE any of the filters that you DID NOT create specially the filters that send emails to Trash folder.
After deleting the filters, do not forget to CHANGE your password ***** well to kick out any hackers who could have accessed your account without your knowledge.
I hope that helped.
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