Yesterday I went to delete my trash box and spam box and after that I found that all my emails from inbox also dissapeared, except 12 emails from 2010 year. In a "sent" box there are more than 450 emails left and I don't miss anything from that folder. 

Using "view all archived" option, I find 26 emails, but they are of 2013-2014 years.

I would appreciate your help in restoring emails wery much.

Ina