Couple of questions here:
* Are you using the same Adobe ID to sign into the app?
* Did you save your work over the CC libraries?
*Please login to assets.adobe.com and check if you're able to find your work there.
We're here to help-just need some more information.
Did you follow Sheena's advice to check on assets.adobe.com and see the projects there?
It can take a little while for the projects to fully sync—I have a lot of projects and have recently added two new devices, so experienced that recently. You could also try giving the servers a "little prompt" perhaps by creating a new project—maybe when that starts syncing it'll accelerate the others (just a guess, but worth a shot).
Please come back to us soon and let us know if your issue's resolved.