I have had problems with outlook 2013 since Aug or Sept of 2014.

Windows 8 (8.1) I have had outlook 2013 on my work desktop windows 8.1 computer since September 2014. How do I view my new inbox and sent messages? I view the received messages as popups but after I view the email I can't find them again. My outbox is empty. The newest message I have in my inbox is from 9/23/2014 even though I have received several messages today as popups, none are in my inbox folder. I have sent emailed myself a few test emails today, I can't find any of the received or sent emails from me or anyone else. I have tried typing the senders name and email addresses in the search bar at the top of the page, that too has been unsuccessful. Please Help! I correspond with my customers via email all through the day.

Right now I am using my service providers web based email account instead of using Outlook 2013.

Your assistance/ advice would be appreciated

ClaranceB