Hi, My name is ***** ***** certified computer professional with over 10 years experience. I will be glad to assist you with this. .I am sorry to hear that you are having this issue. This sounds like a glitch with the operating system. A forced reboot will most likely correct the problem. Press and hold the power button for 30 seconds then release. Then power back on and check for normal operation.
They should be safe if they were previously in the Iphoto and you moved them from that location.
To rebuild the iPhoto library:
The is a separate file, called a “photo library” file, by default is stored inside of the pictures folder in your user folder