If you noticed yesterday outage of the Google e-mail service, it was an error on your side. Google had a bug in the system of contacts and it caused malfunction of the web interface of Gmail. Failure of the service lasted approximately two hours and affected mainly web interface. Users, who accessed their mailbox in alternative ways, probably did not notice any problems.
This time you do not have to worry about the e-mails, the archive has not been affected by this bug. Bug was removed and Gmail is fully functioning now. Although there is no data loss, we should be careful.
Did you already get your backup? I did! ;-)
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