I added some shots to others on my Coolpix S52, on 4th May 2013. On 5th May, I viewed the shots successfully on the camera. I then removed the battery, to charge, and the card to upload but there were no new photos. They are also no longer viewable on the camera. I tried 'Card recovery' and 'Odboso' but no recoverable shots were found, only the shots prior to May 4th. I am using a 4gb SDHC card.
What did I do wrong and can they be retrieved, please?