My iPhone 5 deleted all of my pictures?

This has happened at least 5 times in the past two weeks. I have about 6,500 pictures and 14 videos on my phone, which is 32GB, enough to hold that amount of photos. The phone is about two years old, if that matters. The few times that this has happened before, the photos have always started to restore after about 15 minutes, yet this time, the photos are not restoring, and I'm starting to worry, considering it's been about an hour. I don't have the photos backed up on iCloud, but they have to be backed up somewhere, as they normally come back. I'm starting to panic, should I wait until tomorrow to see what happens and then go to the phone store? What could be causing this?

Hi, there's another way to recover your deleted photos by using of data recovery software. There are many software around that can do recovering, but choose a software that is right for your IOS phone.