So this has happened enough now that it's becoming a problem. I take several photos on my Inspire then a few days later they are gone. They don't appear in the gallery anymore.
To take it a step farther, I had taken some photos then cropped and edited them some on the phone. I uploaded them to a blog post but the original photos on the phone show up with what I'm assuming is corrupted image files. They are in the gallery but just no thumbnail and they don't open.