It sounds like perhaps your wallet has forked for some reason.
I had a similar issue recently with someone elses wallet where they sent 10 coins as a test from Trex to desktop, they arrives so they preceded to send the rest of the coins which did not arrive.
Rest assured, if you spend some time on the wallet with my help you will get it working and your coins will appear.

Check this guide first, to see if your wallet is in sync with Block explorer or not.
https://drive.google.com/file/d/0B-LjE0xRCrVZM1A3ZGotZnYxY3M/view?usp=sharing


Feel free to add me on Skype and I'll try to help you more directly than on here  (sending you a PM with my Skype handle).