Total Posts: 867
If I understood you correctly, you cannot see your products and cannot manage them from your back-end.
To check whether this is an issue with your admin or with database, you can use alternative solution for Magento catalog management. You can try Store Manager for Magento application. It is desktop solution and it works directly with database. In case using it your will be able to see your products and do modifications with them, it will most likely denote that you have the issue with your admin or cart installation.
In case, the issue will remain, you will have to check for some deeper issue.
If you are interested, you can at least try it out, since therte is 14-day free version of Store Manager available for download -
Hope it helps.